Pharmacovigilance of the effects associated with vaccination against SARS-CoV-2 in the health personnel of a hospital for the exclusive care of patients with COVID-19

The Pablo Arturo Suárez Hospital, located in Quito, the capital of Ecuador, became an exclusive care hospital for COVID-19 patients in March 2020. It was one of the first centers to immunize its staff with a single type of vaccine, that of Pfizer-BioNTech. A pharmacovigilance study was conducted on 1304 health workers from this center who were immunized between January and March 2021. The vaccinated had an average age of 38.7 years, and the female sex predominated (63%). 81 (6%) immunized reported adverse effects, and their mean age was 38.8 years;women (69%) predominated, similar to the total population. Three hundred five adverse effects related to vaccines were reported;of them, only 1 (0.3%) was severe and required hospitalization, and the rest (23%) were non-serious. The most reported effects were headache, malaise, and pain at the injection site. The results show a parallel with what has been said worldwide on the safety of vaccines against COVID-19 in general and Pfizer-BioNTech in particular. The relevance of our work lies in the fact that it is one of the first reports of the reactogenicity of this vaccine in a high-altitude city at the beginning of the pandemic, in a court of health personnel directly dedicated to the care of this type of patient. Copyright: © 2022 by the authors.

[Post-COVID-19 syndrome]. / Syndrome post-COVID-19.

In the aftermath of acute infection with the severe acute respiratory syndrome Coronavirus 2 (SARS-CoV-2), a large number of symptoms persist or appear, constituting a real syndrome called "long COVID-19" or "post-COVID- 19" or "post-acute COVID-19 syndrome". Its incidence is very high, half of patients showing at least one symptom at 4-6 months after Coronarovirus infectious disease 2019 (COVID-19). They can affect many organs. The most common symptom is persistent fatigue, similar to that seen after other viral infections. Radiological pulmonary sequelae are relatively rare and not extensive. On the other hand, functional respiratory symptoms, primarily dyspnoea, are much more frequent. Dysfunctional breathing is a significant cause of dyspnoea. Cognitive disorders and psychological symptoms are also very common, with anxiety, depression and post-traumatic stress symptoms being widely described. On the other hand, cardiac, endocrine, cutaneous, digestive or renal sequelae are rarer. The symptoms generally improve after several months, even if their prevalence at two years remains significant. Most of the symptoms are favored by the severity of the initial illness, and the psychic symptoms by the female sex. The pathophysiology of most symptoms is poorly understood. The influence of the treatments used in the acute phase is also important. Vaccination, on the other hand, seems to reduce their incidence. The sheer number of affected patients makes long-term COVID-19 syndrome a public health challenge.

Safety application of novel coronavirus pneumonia antiviral drugs.

Three antiviral drugs, including interferon alpha (aerosol inhalation), lopinavir/ritonavir (oral medication), and ribavirin (intravenous infusion), are recommended by Diagnosis and Treatment of Novel Coronavirus Pneumonia (revised version, the 5th ed), which was issued by the National Health Commission of People's Republic of China and National Administration of traditional Chinese Medicine. In addition, clinical trials on a new antiviral drug-remdesivir which is not yet on the market has also been launched in China. Medication safety related data on treatment for infections of severe acute respiratory syndrome coronavirus, middle respiratory syndrome coronavirus, human immunodeficiency virus, lopinavir/ritonavir, and ribavirin, safety data of remdesivir in animal experiment, phase I clinical trials and clinical trials of treating Ebola virus infection, and preliminary reports of treatment in novel coronavirus pneumonia were briefly reviewed, aiming to provide evidence for clinical safety medication.Copyright © 2020 by the Chinese Medical Association.

Impacto de la pandemia por COVID-19 de enero a junio de 2020 en la formación académica de residentes en la Universidad de Antioquia

Objetivos: conocer el impacto de la pandemia del COVID-19 en la formación académica de residentes de especialidades médicas y quirúrgicas de la Universidad de Antioquia por medio de una encuesta en línea sobre la percepción de la situación durante los meses de enero a junio del 2020. Métodos: estudio observacional, descriptivo y de corte transversal a través de una encuesta difundida entre residentes de especialidades durante el aislamiento social. Resultados: la encuesta fue respondida por 156 residentes. El 47 % convive con personas consideradas de alto riesgo para COVID-19. Todos los residentes contaron con dispositivos electrónicos y buena conectividad para realizar las actividades en línea. El 30 % de los encuestados se ha sentido discriminado por ser personal del área de la salud. Se ha sentido satisfecho por su formación en aspectos teóricos el 81,4 % y en actividades prácticas el 55,1 %. El riesgo de contagio por COVID-19 es el aspecto con mayor impacto negativo, reportado por el 61 %. Los residentes se ausentaron de sus sitios de práctica en promedio 31 días. El 52 % participó en actividades de telesalud. La mayoría de los residentes (97,5 %) participó en actividades virtuales. Discusión: la pandemia del COVID-19 impactó significativamente los procesos formativos de los médicos residentes. La encuesta documenta una sensible disminución de las actividades asistenciales y el acceso a las actividades prácticas, con un evidente incremento de actividades por medio de las tecnologías de la información y la comunicación. La pandemia ha impulsado un proceso de adaptación en las instituciones educativas para cumplir con la planeación de las actividades programadas.Alternate : Objective: To evaluate the impact of the COVID-19 pandemic on the academic development of residents in medical and surgical specialties at the University of Antioquia through an online survey. Methods: Observational, descriptive, and cross-sectional study involving a survey distributed to medical residents. Results: The survey was completed by 156 residents. They all had electronic devices and the means necessary to carry out virtual activities. Almost half of the participants (47.4%) lived with people who were considered high-risk for COVID-19. Of those surveyed, 30.1% felt discriminated against for being healthcare workers. Even though 81.4% of participants were satisfied with the theoretical training, only 55.1% were satisfied with the practical training. The most detrimental impact was the risk of contracting COVID-19, which was reported by 61% of participants. On average, residents were absent for 31 days. Fifty two percent of residents participated in telehealth activities, and 97.5% participated in virtual activities. Discussion: The COVID-19 pandemic significantly impacted the training of residents. This study quantified a decrease of in-person educational activities including practical activities and an increase in virtual methods of education and communication. The pandemic has forced educational institutions to transform the way they teach in order to follow public health measures.

A review on the identification of COVID-19, SARS and MERS.

COVID-19 is a global pandemic, which is the third outbreak and epidemic of infectious disease caused by coronavirus in this century and constitutes a major threat to human health.In this paper, COCOVID-19, Severeacute respiratory syndrome (SARS) and Middle East Respiratory syndrome (MERS) were analyzed to distinguish their clinical features, diagnosis, prognosis and prevention, so as to better prevent and treat related diseases.Copyright © 2020 Chinese Medical Association

A review on the identification of COVID-19, SARS and MERS.

COVID-19 is a global pandemic, which is the third outbreak and epidemic of infectious disease caused by coronavirus in this century and constitutes a major threat to human health.In this paper, COCOVID-19, Severeacute respiratory syndrome (SARS) and Middle East Respiratory syndrome (MERS) were analyzed to distinguish their clinical features, diagnosis, prognosis and prevention, so as to better prevent and treat related diseases.Copyright © 2020 Chinese Medical Association

A review on the identification of COVID-19, SARS and MERS.

COVID-19 is a global pandemic, which is the third outbreak and epidemic of infectious disease caused by coronavirus in this century and constitutes a major threat to human health.In this paper, COCOVID-19, Severeacute respiratory syndrome (SARS) and Middle East Respiratory syndrome (MERS) were analyzed to distinguish their clinical features, diagnosis, prognosis and prevention, so as to better prevent and treat related diseases.Copyright © 2020 Chinese Medical Association

Chemoinformatics and bioinformatics by discrete mathematics and numbers: an adventure from small data to the realm of emerging big data

Currently, we are witnessing the emergence of big data in various fields including the biomedical and natural sciences. The size of chemoinformatics and bioinformatics databases is increasing every day. This gives us both challenges and opportunities. This chapter discusses the mathematical methods used in these fields both for the generation and analysis of such data. It is emphasized that proper use of robust statistical and machine learning methods in the analysis of the available big data may facilitate both hypothesis-driven and discovery-oriented research. © 2023 Elsevier Inc. All rights reserved.

Effect of Parenteral Corticosteroids in Mortality from Severe Covid-19 / Efecto de los Corticoides Parenterales en la Mortalidad por Covid-19 Severo

Introducción. La infección causada por el SARS-CoV-2 puede producir un cuadro inflamatorio severo, sepsis, falla respiratoria, disfunción orgánica, y muerte. Es plausible fisiopatológicamente, que los corticoides sean una opción terapéutica razonable para Covid-19. Sin embargo, la evidencia del efecto benéfico de los corticoides sobre la mortalidad no es categórica. Objetivo: determinar si existe evidencia que avale el uso de corticoides parenterales en Covid-19 grave y Síndrome de Distrés Respiratorio Agudo (SDRA). Material y método: Este estudio se desarrolló en concordancia con la guía PRIMA. Según la estrategia PICO, nuestra Población fueron los pacientes con Covid-19 grave y/o SRDA; la Intervención, el uso de corticoides parenterales; el Comparador, los pacientes con Covid-19 severo con tratamiento estándar (sin corticoides); y el Outcome, la mortalidad y otros resultados clínicos. La búsqueda se realizó en las bases de datos PubMed, Medline, Cochrane, Embase, y LILACS usando los términos relacionados con nuestra pregunta PICO, entre el de 01 enero al 31 de agosto del 2020. Se logró recopilar un total de 287 artículos, de los que finalmente se seleccionaron 9 que cumplieron con los criterios PICO y de selección. Resultados: Según nuestro estudio, los corticoides parenterales reducen la mortalidad en pacientes con Covid-19 severo y SRDA[OR 0.83 (IC 95% 0.63-1.08)]. Conclusión: la revisión sistemática muestra que los corticoides parenterales podrían disminuir la mortalidad de pacientes con Covid-19 severo y ARDS.

Introduction. Infections caused by SARS-CoV-2 may produce a severe inflammatory response,sepsis, respiratory failure, organ dysfunction, and death. From a pathophysiological point of view, it is plausible that glucocorticoids could be a reasonable therapeutic option for Covid-19. However, the evidence supporting the benefit of corticosteroids on mortality and other clinical outcomes is no tconclusive. Objective: determinate if there exist evidence supporting corticosteroids therapy in patients with severe Covid-19 and Acute Respiratory Distress Syndrome (ARDS). Material and method: This study was performed in concordance with PRISMA guidelines. According to the PICO strategy, Population were patients with severe Covid-19 and/or ARDS; Intervention, parenteral corticosteroid administration; Comparator, patients with severe Covid-19 and/or ARDS with standard treatment (without corticosteroids); and Outcome, mortality and other clinical outcomes. Search strategy was performed in the data bases PubMed, Medline, Cochrane, Embase, and LILACS, using terms related with the PICO question; from January 1 to august 31 (2020). A total of 287 articles were initially retrieved. Of these, we finally selected only 9 article which fulfilled with PICO and selection criteria. Results: According to our study, parenteral corticosteroids reduce mortality in patients with Severe Covid-19 and/or ARDS [OR 0.83 (IC 95% 0.63-1.08)]. Conclusion: the systematic review shows that parenteral corticosteroids could reduce the mortality of patients with severe Covid-19 and ARDS.

SARS-CoV-2 in Pregnancy-The First Wave.

Background and Objectives: COVID-19, a disease caused by SARS-CoV-2, is a public health emergency. Data on the effect of the virus on pregnancy are limited. Materials and Methods: We carried out a retrospective descriptive study, in order to evaluate the obstetric results on pregnant women in which SARS-CoV-2 was detected through RT-PCR of the nasopharyngeal swab, at admission to the maternity hospital. Results: From 16 March to 31 July 2020, 12 SARS-CoV-2 positive pregnant women have been hospitalized. Eleven were hospitalized for initiation or induction of labor, corresponding to 0.64% of deliveries in the maternity hospital. One pregnant woman was hospitalized for threatened abortion, culminating in a stillbirth at 20 weeks of gestation. Regarding the severity of the disease, nine women were asymptomatic and three had mild illness (two had associated cough and one headache). Three had relevant environmental exposure and a history of contact with infected persons. None had severe or critical illness due to SARS-CoV-2. There were no maternal deaths. The following gestational complications were observed: one stillbirth, one preterm labor, one preterm prelabor rupture of membranes, and one fetal growth restriction. Four deliveries were eutocic, two vacuum-assisted deliveries and five were cesarean sections. The indications for cesarean section were obstetric. Conclusions: SARS-CoV-2 infection was found in a minority of hospitalized pregnant women in this sample. Most are asymptomatic or have mild illness, from gestational complications to highlight stillbirth and preterm birth. There were no cases of vertical transmission by coronavirus.

Genomic surveillance of SARS-CoV-2 in Puerto Rico enabled early detection and tracking of variants.

Background: Puerto Rico has experienced the full impact of the COVID-19 pandemic. Since SARS-CoV-2, the virus that causes COVID-19, was first detected on the island in March of 2020, it spread rapidly though the island's population and became a critical threat to public health. Methods: We conducted a genomic surveillance study through a partnership with health agencies and academic institutions to understand the emergence and molecular epidemiology of the virus on the island. We sampled COVID-19 cases monthly over 19 months and sequenced a total of 753 SARS-CoV-2 genomes between March 2020 and September 2021 to reconstruct the local epidemic in a regional context using phylogenetic inference. Results: Our analyses reveal that multiple importation events propelled the emergence and spread of the virus throughout the study period, including the introduction and spread of most SARS-CoV-2 variants detected world-wide. Lineage turnover cycles through various phases of the local epidemic were observed, where the predominant lineage was replaced by the next competing lineage or variant after ~4 months of circulation locally. We also identified the emergence of lineage B.1.588, an autochthonous lineage that predominated in Puerto Rico from September to December 2020 and subsequently spread to the United States. Conclusions: The results of this collaborative approach highlight the importance of timely collection and analysis of SARS-CoV-2 genomic surveillance data to inform public health responses.

Neurological Complications in COVID-19 Patients: Can Analysis of Specific Antibodies and Viral RNA in Paired Cerebrospinal Fluid and Serum be Used for Accurate Diagnosis of SARS-CoV-2 Neuroinflammatory Disease? A Case Series.

Background: Neurological complications during and after SARS-CoV-2 infection have been frequently described. The detection of either SARS-CoV-2 RNA or specific antibodies against SARS-CoV-2 in cerebrospinal fluid in the context of concomitant neurological manifestations indicates neuroinfection. Methods and Results: This is a retrospective descriptive analysis of cerebrospinal fluids and serum samples from 2 hospitalized patients and autopsy findings from 2 patients who died at home. Samples were analysed by 3 independent enzyme-linked immunosorbent assays. Specific antibodies against SARS-CoV-2 were detected in cerebrospinal fluids and paired serum in all 4 cases. Levels of antibodies in cerebrospinal fluids were highest in samples from a deceased man with critical progression of COVID-19 and detectable SARS-CoV-2 viral RNA in cerebrospinal fluid, serum, 4 brain biopsies and 15 additional tissue samples, though immunohistochemical staining for SARS-CoV-2 in brain tissue did not detect the virus. Conclusion: Detection of SARS-CoV-2 antibodies in paired serum and cerebrospinal fluid may support the presence of SARS-CoV-2 neuroinflammatory disease in patients with COVID-19 and neurological manifestations.

Gain-of-function research.

The term Gain-of-Function (GoF) describes the gain of new functions by organisms through genetic changes, which can naturally occur or by experimental genetic modifications. Gain-of-Function research on viruses is enhancing transmissibility, virus replication, virulence, host range, immune evasion or drug and vaccine resistance to get insights into the viral mechanisms, to create and analyze animal models, to accelerate drug and vaccine development and to improve pandemic preparedness. A subset is the GoF research of concern (GOFROC) on enhanced potentially pandemic pathogens (ePPPs) that could be harmful for humans. A related issue is the military use of research as dual-use research of concern (DURC). Influenza and coronaviruses are main research targets, because they cause pandemics by airborne infections. Two studies on avian influenza viruses initiated a global debate and a temporary GoF pause in the United States which ended with a new regulatory framework in 2017. In the European Union and China, GoF and DURC are mainly covered by the legislation for laboratory safety and genetically modified organisms. After the coronavirus outbreaks, the GoF research made significant advances, including analyses of modified MERS-like and SARS-like viruses and the creation of synthetic SARS-CoV-2 viruses as a platform to generate mutations. The GoF research on viruses will still play an important role in future, but the need to clarify the differences and overlaps between GoF research, GOFROC and DURC and the need for specialized oversight authorities are still debated.

Comparison of the Psychological Impact of COVID-19 on Self-Employed Private Healthcare Workers with Respect to Employed Public Healthcare Workers: Three-Wave Study during the COVID-19 Pandemic in Spain.

(1) Background: Coronavirus disease, also called COVID-19, is a worldwide pandemic with a major impact on all aspects of the individual (health status, psychological, and economic aspects, among others). The perception of health professionals in this situation has been influenced by their economic and psychosocial situations. On the economic level, self-employed workers have no state subsidies, with the added disadvantage of not having sufficient means to cope with contagion. This could potentially have an impact on their health and indirectly on their family members, creating additional stress. The aim of this study was to determine whether there are differences in the level of anxiety of health professionals working in private practice compared to healthcare workers working in public institutions during the first three waves of COVID-19. (2) Methods: A cohort study on 517 subjects comparing anxiety between a group of health workers and a group of health professionals working in the public sector at three key moments during the pandemic was performed. (3) Results: Statistically significant differences were found between self-employed private health professionals compared to those working as public health workers. The perception of impact was worse in the self-employed; however, a higher level of anxiety was evident in public employees in all assessed domains (cognitive, physiological, and motor, p = 0.001). (4) Conclusions: There were significant changes when comparing the first phase between both groups; employed public healthcare workers manifested a sense of lower risk of COVID-19 contagion than privately employed professionals, who had a higher level of anxiety. In the second and third waves, negative feelings improved for both groups, and the fear of showing anxiety to the patient decreased over the course of the waves.

HIV, HSV, SARS-CoV-2 and Ebola Share Long-Term Neuropsychiatric Sequelae.

Long COVID, in which disease-related symptoms persist for months after recovery, has led to a revival of the discussion of whether neuropsychiatric long-term symptoms after viral infections indeed result from virulent activity or are purely psychological phenomena. In this review, we demonstrate that, despite showing differences in structure and targeting, many viruses have highly similar neuropsychiatric effects on the host. Herein, we compare severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), human immunodeficiency virus 1 (HIV-1), Ebola virus disease (EVD), and herpes simplex virus 1 (HSV-1). We provide evidence that the mutual symptoms of acute and long-term anxiety, depression and post-traumatic stress among these viral infections are likely to result from primary viral activity, thus suggesting that these viruses share neuroinvasive strategies in common. Moreover, it appears that secondary induced environmental stress can lead to the emergence of psychopathologies and increased susceptibility to viral (re)infection in infected individuals. We hypothesize that a positive feedback loop of virus-environment-reinforced systemic responses exists. It is surmised that this cycle of primary virulent activity and secondary stress-induced reactivation, may be detrimental to infected individuals by maintaining and reinforcing the host's immunocompromised state of chronic inflammation, immunological strain, and maladaptive central-nervous-system activity. We propose that this state can lead to perturbed cognitive processing and promote aversive learning, which may manifest as acute, long-term neuropsychiatric illness.

Evaluating COVID-19's impact on the training of residents at the University of Antioquia from January to June 2020

Objective: To evaluate the impact of the COVID-19 pandemic on the aca-demic development of residents in medical and surgical specialties at the University of Antioquia through an online survey. Method(s): Observational, descriptive, and cross-sectional study involving a survey distributed to medical residents. Result(s): The survey was completed by 156 residents. They all had electronic devices and the means necessary to carry out virtual activities. Almost half of the participants (47.4%) lived with people who were considered high-risk for COVID-19. Of those surveyed, 30.1% felt discriminated against for being healthcare workers. Even though 81.4% of participants were satisfied with the theoretical training, only 55.1% were satisfied with the practical training. The most detrimental impact was the risk of contracting COVID-19, which was reported by 61% of participants. On average, residents were absent for 31 days. The 52% of residents participated in telehealth activities, and 97.5% participated in virtual activities. Discussion(s): The COVID-19 pandemic significantly impacted the training of residents. This study quantified a decrease of in-person educational activities including practical activities and an increase in virtual methods of education and communication. The pandemic has forced educational ins-titutions to transform the way they teach in order to follow public health measures. Copyright © 2023 Universidad de Antioquia.

[French research organization on emerging infectious diseases: From REACTing to ANRS emerging infectious diseases]. / La recherche française face aux maladies infectieuses émergentes : de REACTing à l'ANRS- maladies infectieuses émergentes.

Emerging infectious diseases (EIDs) can be responsible for epidemics or even pandemics that disrupt societies and cause national and international crises. In our globalized world, anarchic urbanization, ecosystem disruptions (deforestation, creation of dams…), changes in crop and livestock farming conditions, the increasing availability of air transport, population displacement and climate change are all factors that favor the occurrence and spread of emerging or re-emerging pathogens such as SARS-Cov, MERS-CoV, Ebola, Zika, influenza, or more recently SARS-CoV-2 and Monkeypox. States, regional and international organizations, health and research agencies, non-governmental organizations and the pharmaceutical industry are today challenged by the repetition of these crises and their consequences on health, social, economic and political balances. For the past fifteen years, we have clearly been in a new regime of infectious emergence and re-emergence. This new regime calls for new responses, to meet in the urgency the challenges of emergency epidemic crises and to better respond to the issues of crisis management in a context of "One Health". Research is an essential pillar in the response to these epidemics with a double challenge: (i) to improve knowledge on the disease, its prevention, treatment, diagnosis, impact on society. and (ii) to prepare for and understand future emergencies, "anticipate". As epidemics have occurred over the last fifteen years, French research has been organized and has evolved to respond to these crises, from the genesis of REACTing in 2011, to the creation of the ANRS Emerging Infectious Diseases in 2021.

Molecular epidemiology of SARS-CoV-2, RSV and FLU in children with Severe Acute Respiratory Infection

Covid-19 in children can cause serious cases just like in adults. In our environment, the characterization of respiratory viruses that cause severe acute respiratory infection (SARI) is not known since the beginning of the Covid-19 pandemic. Objective: to evaluate the epidemiological behavior of SARS CoV-2, RSV and FLU as the cause of SARI in patients admitted to the Manuel Ascencio Villarroel Children's Hospital in Cochabamba. Methods: 41 patients up to 5 years of age admitted from June 2021 to June 2022 were included. Polymerase chain reaction (RT-qPCR) was used to detect SARS-CoV-2, RSV and FLU type A and B. Results: RSV was detected in 47.6% of patients, SARS-CoV-2 in 42.9%, and coinfection between SARS CoV-2 and RSV in 9.5%. There were no cases of FLU infection. Fever and cough were reported mainly in 76.2% and 61.9% respectively. 14.3% of patients were admitted to intensive care, two patients died, one with a viral coinfection SARS CoV-2/RSV and the other with simple viral infection by SARS CoV-2. Conclusions: after the easing of restrictions following the start of the Covid-19 pandemic, RSV and SARS CoV-2 were found to be the agents causing SARI with a similar frequency of circulation. Respiratory manifestations are more frequent, showing mostly stable states and favorable recovery in most cases. Constant epidemiological surveillance is necessary given the experience of the Covid-19 pandemic. © 2022 The authors.

[Impact of the first year of the COVID-19 pandemic on the epidemiology of invasive infections (bacteremia) in the hospitals of the Assistance Publique-Hôpitaux de Paris]. / Impact de la première année de la pandémie de COVID-19 sur l'épidémiologie des infections invasives (bactériémies) dans les hôpitaux de l'Assistance Publique­Hôpitaux de Paris.

Introduction: The COVID-19 pandemic has led to a massive influx of patients suffering from severe forms of the disease into hospitals, often requiring intensive care (vascular catheters, ventilation, etc.) which exposes them to high risks of nosocomial infections, particularly invasive infections (bacteremia). Method: The impact of the COVID-19 pandemic on the epidemiology of bacteremia in 2020 was analysed in 25 hospitals of the Assistance Publique-Hôpitaux de Paris (AP-HP, approximately 14,000 beds, covering the Île-de-France region). Up to a quarter of patients admitted to AP-HP during the March-April period (peak of the 1st wave) were infected with COVID-19. The incidence over 100 admissions of bacteraemia increased overall compared to previous years: by 24% in March 2020 and by 115% in April. Results: The evolution of the incidence of bacteremia was not the same for 2 groups of microorganisms with very different ecologies. For the "hospital" type microorganisms classically responsible for nosocomial infections, the incidence increased significantly in March-April 2020: Klebsiella pneumoniae (×2.3), Pseudomonas aeruginosa (×2.4), Staphylococcus aureus (×2.4), enterococci (×3.4), yeasts (×2.7). Two thirds of the bacteremias caused by these microorganisms were considered as acquired during hospitalization. Importantly, there was also a sharp increase in the incidence of bacteremia caused by antibiotic-resistant strains. The antibiotics used as indicators were the 3rd generation cephalosporins (3GCs), major antibiotics in the treatment of serious infections used for monitoring bacterial resistance in Europe. For example, the incidence of bacteremia with 3GC-resistant strains increased threefold in April 2020 for K. pneumoniae. During the same period, the consumption of 3GC increased sharply in the same hospitals (+131% in March and +148% in April). For Streptococcus pneumoniae (pneumococcus) and Streptococcus pyogenes (group A hemolytic streptococcus), two pathogens responsible for mainly community and respiratory-transmitted infections, the pandemic had the opposite effect. There was a decrease in incidence in 2020 by 34% and 28% respectively for these two species, particularly in the spring when strict containment, physical distancing and mask-wearing measures were in place. A slight re-emergence of infections with these two species occurred in the summer of 2020 after the relaxation of prevention measures. In contrast to what was seen above, 4/5 of the bacteremias caused by these two species were considered as community-acquired. Conclusion: The COVID-19 pandemic which had a strong impact on hospital management and social organization in the general population, had opposite impacts on the incidence of bacteremia depending on the pathogens and their mode of transmission.