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1.
Higher Education Quarterly ; 77(2):356-374, 2023.
Artículo en Inglés | Academic Search Complete | ID: covidwho-2301198

RESUMEN

Campus crisis management remains an understudied topic in the context of COVID‐affected higher education. In this paper, we contrasted the ability to tame the wicked problems brought by the pandemic of COVID‐19 in private and public universities in Bangladesh, Cambodia, Colombia, India, Kazakhstan, Uganda, and Ukraine. The cross‐country analysis and diversity of institutional types allowed us to consider a wide range of challenges faced by academic leaders and their institutions during the global pandemic. By drawing on institutional policy reviews and interviews with university administrators, we have examined tensions between the human and institutional agencies on these crisis‐stricken campuses given differing institutional coupling, sizes, resources, and missions. The focus on agential co‐dependencies and institutional coupling lays the ground for conceptualizing campus crisis management as a culturally specific construct in the context of higher education affected by the global pandemic. [ FROM AUTHOR] Copyright of Higher Education Quarterly is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full . (Copyright applies to all s.)

2.
Change: The Magazine of Higher Learning ; 54(2):52-58, 2022.
Artículo en Inglés | ProQuest Central | ID: covidwho-1984626

RESUMEN

The COVID-19 pandemic, the climate and refugee crises, and the global supply chain disruption, among others, have exemplified the high level of planetary connectedness the world endures today, making the phrase "we are all in this together" an undeniable fact. A joint statement from the U.S. Department of State and the U.S. Department of Education on July 26, 2021 highlights the impact of internationalization on national security and the economy. These impacts occur because all forms of ties among people across national borders pave the way to partnerships and alliances in government, business, trade, science, innovation, and the arts and culture. While international partnerships can be problematic, those grounded in mutuality can be transformational for both partners. In this article, Pilar Mendoza describes her journey to build a joint research center that reflects mutuality and she offers recommendations based on her experiences that can help faculty and administrators develop and support similar international collaborations.

3.
Higher Education Quarterly ; n/a(n/a), 2022.
Artículo en Inglés | Wiley | ID: covidwho-1978476

RESUMEN

Campus crisis management remains an understudied topic in the context of COVID-affected higher education. In this paper, we contrasted the ability to tame the wicked problems brought by the pandemic of COVID-19 in private and public universities in Bangladesh, Cambodia, Colombia, India, Kazakhstan, Uganda, and Ukraine. The cross-country analysis and diversity of institutional types allowed us to consider a wide range of challenges faced by academic leaders and their institutions during the global pandemic. By drawing on institutional policy reviews and interviews with university administrators, we have examined tensions between the human and institutional agencies on these crisis-stricken campuses given differing institutional coupling, sizes, resources, and missions. The focus on agential co-dependencies and institutional coupling lays the ground for conceptualizing campus crisis management as a culturally specific construct in the context of higher education affected by the global pandemic.

4.
Nature ; 600(7889): 517-522, 2021 12.
Artículo en Inglés | MEDLINE | ID: covidwho-1454790

RESUMEN

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection produces B cell responses that continue to evolve for at least a year. During that time, memory B cells express increasingly broad and potent antibodies that are resistant to mutations found in variants of concern1. As a result, vaccination of coronavirus disease 2019 (COVID-19) convalescent individuals with currently available mRNA vaccines produces high levels of plasma neutralizing activity against all variants tested1,2. Here we examine memory B cell evolution five months after vaccination with either Moderna (mRNA-1273) or Pfizer-BioNTech (BNT162b2) mRNA vaccine in a cohort of SARS-CoV-2-naive individuals. Between prime and boost, memory B cells produce antibodies that evolve increased neutralizing activity, but there is no further increase in potency or breadth thereafter. Instead, memory B cells that emerge five months after vaccination of naive individuals express antibodies that are similar to those that dominate the initial response. While individual memory antibodies selected over time by natural infection have greater potency and breadth than antibodies elicited by vaccination, the overall neutralizing potency of plasma is greater following vaccination. These results suggest that boosting vaccinated individuals with currently available mRNA vaccines will increase plasma neutralizing activity but may not produce antibodies with equivalent breadth to those obtained by vaccinating convalescent individuals.


Asunto(s)
Vacunas contra la COVID-19/inmunología , Evolución Molecular , Glicoproteína de la Espiga del Coronavirus/inmunología , Vacunas Sintéticas/inmunología , Vacunas de ARNm/inmunología , Vacuna nCoV-2019 mRNA-1273/inmunología , Adulto , Anciano , Anticuerpos Monoclonales/inmunología , Anticuerpos Neutralizantes/inmunología , Anticuerpos Antivirales/inmunología , Afinidad de Anticuerpos , Vacuna BNT162/inmunología , Estudios de Cohortes , Reacciones Cruzadas , Ensayo de Inmunoadsorción Enzimática , Epítopos de Linfocito B/inmunología , Femenino , Humanos , Masculino , Células B de Memoria/inmunología , Persona de Mediana Edad , Pruebas de Neutralización , Dominios Proteicos/inmunología , Glicoproteína de la Espiga del Coronavirus/química , Adulto Joven
5.
J Exp Med ; 218(4)2021 04 05.
Artículo en Inglés | MEDLINE | ID: covidwho-1387677

RESUMEN

SARS-CoV-2 is responsible for an ongoing pandemic that has affected millions of individuals around the globe. To gain further understanding of the immune response in recovered individuals, we measured T cell responses in paired samples obtained an average of 1.3 and 6.1 mo after infection from 41 individuals. The data indicate that recovered individuals show persistent polyfunctional SARS-CoV-2 antigen-specific memory that could contribute to rapid recall responses. Recovered individuals also show enduring alterations in relative overall numbers of CD4+ and CD8+ memory T cells, including expression of activation/exhaustion markers, and cell division.


Asunto(s)
COVID-19/inmunología , COVID-19/virología , Interacciones Huésped-Patógeno/inmunología , Inmunidad Celular , SARS-CoV-2/inmunología , Adulto , Anciano , Antígenos Virales/inmunología , Biomarcadores , Femenino , Humanos , Inmunofenotipificación , Recuento de Linfocitos , Masculino , Persona de Mediana Edad , Especificidad del Receptor de Antígeno de Linfocitos T , Subgrupos de Linfocitos T/inmunología , Subgrupos de Linfocitos T/metabolismo , Adulto Joven
6.
Nature ; 591(7851): 639-644, 2021 03.
Artículo en Inglés | MEDLINE | ID: covidwho-1065898

RESUMEN

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has infected 78 million individuals and is responsible for over 1.7 million deaths to date. Infection is associated with the development of variable levels of antibodies with neutralizing activity, which can protect against infection in animal models1,2. Antibody levels decrease with time, but, to our knowledge, the nature and quality of the memory B cells that would be required to produce antibodies upon reinfection has not been examined. Here we report on the humoral memory response in a cohort of 87 individuals assessed at 1.3 and 6.2 months after infection with SARS-CoV-2. We find that titres of IgM and IgG antibodies against the receptor-binding domain (RBD) of the spike protein of SARS-CoV-2 decrease significantly over this time period, with IgA being less affected. Concurrently, neutralizing activity in plasma decreases by fivefold in pseudotype virus assays. By contrast, the number of RBD-specific memory B cells remains unchanged at 6.2 months after infection. Memory B cells display clonal turnover after 6.2 months, and the antibodies that they express have greater somatic hypermutation, resistance to RBD mutations and increased potency, indicative of continued evolution of the humoral response. Immunofluorescence and PCR analyses of intestinal biopsies obtained from asymptomatic individuals at 4 months after the onset of coronavirus disease 2019 (COVID-19) revealed the persistence of SARS-CoV-2 nucleic acids and immunoreactivity in the small bowel of 7 out of 14 individuals. We conclude that the memory B cell response to SARS-CoV-2 evolves between 1.3 and 6.2 months after infection in a manner that is consistent with antigen persistence.


Asunto(s)
Anticuerpos Antivirales/inmunología , COVID-19/inmunología , Inmunidad Humoral/inmunología , SARS-CoV-2/inmunología , Adolescente , Adulto , Anciano , Anticuerpos Monoclonales/sangre , Anticuerpos Monoclonales/inmunología , Anticuerpos Neutralizantes/sangre , Anticuerpos Neutralizantes/genética , Anticuerpos Neutralizantes/inmunología , Anticuerpos Antivirales/sangre , Anticuerpos Antivirales/genética , Antígenos Virales/química , Antígenos Virales/genética , Antígenos Virales/inmunología , Linfocitos B/citología , Linfocitos B/inmunología , Biopsia , COVID-19/sangre , Estudios de Cohortes , Técnica del Anticuerpo Fluorescente , Humanos , Inmunidad Humoral/genética , Inmunoglobulina A/inmunología , Inmunoglobulina G/inmunología , Inmunoglobulina M/inmunología , Memoria Inmunológica/inmunología , Intestinos/inmunología , Persona de Mediana Edad , Mutación , Hipermutación Somática de Inmunoglobulina , Glicoproteína de la Espiga del Coronavirus/química , Glicoproteína de la Espiga del Coronavirus/genética , Glicoproteína de la Espiga del Coronavirus/inmunología , Factores de Tiempo , Adulto Joven
7.
Curr Opin HIV AIDS ; 16(1): 25-35, 2021 01.
Artículo en Inglés | MEDLINE | ID: covidwho-940835

RESUMEN

PURPOSE OF REVIEW: The coronavirus disease 2019 (COVID-19) pandemic has caught the world unprepared, with no prevention or treatment strategies in place. In addition to the efforts to develop an effective vaccine, alternative approaches are essential to control this pandemic, which will most likely require multiple readily available solutions. Among them, monoclonal anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibodies have been isolated by multiple laboratories in record time facilitated by techniques that were first pioneered for HIV-1 antibody discovery. Here, we summarize how lessons learned from anti-HIV-1 antibody discovery have provided fundamental knowledge for the rapid development of anti-SARS-CoV-2 antibodies. RECENT FINDINGS: Research laboratories that successfully identified potent broadly neutralizing antibodies against HIV-1 have harnessed their antibody discovery techniques to isolate novel potent anti-SARS-CoV-2 antibodies, which have efficacy in animal models. These antibodies represent promising clinical candidates for treatment or prevention of COVID-19. SUMMARY: Passive transfer of antibodies is a promising approach when the elicitation of protective immune responses is difficult, as in the case of HIV-1 infection. Antibodies can also play a significant role in post-exposure prophylaxis, in high-risk populations that may not mount robust immune responses after vaccination, and in therapy. We provide a review of the recent approaches used for anti-SARS-CoV-2 antibody discovery and upcoming challenges in the field.


Asunto(s)
Anticuerpos Antivirales/inmunología , Anticuerpos ampliamente neutralizantes/inmunología , COVID-19/virología , Infecciones por VIH/inmunología , VIH-1/inmunología , SARS-CoV-2/inmunología , Animales , Anticuerpos Antivirales/administración & dosificación , Investigación Biomédica/tendencias , Anticuerpos ampliamente neutralizantes/administración & dosificación , COVID-19/inmunología , Infecciones por VIH/virología , VIH-1/genética , Humanos , SARS-CoV-2/genética , Tratamiento Farmacológico de COVID-19
8.
J Exp Med ; 217(11)2020 11 02.
Artículo en Inglés | MEDLINE | ID: covidwho-697830

RESUMEN

The emergence of SARS-CoV-2 and the ensuing explosive epidemic of COVID-19 disease has generated a need for assays to rapidly and conveniently measure the antiviral activity of SARS-CoV-2-specific antibodies. Here, we describe a collection of approaches based on SARS-CoV-2 spike-pseudotyped, single-cycle, replication-defective human immunodeficiency virus type-1 (HIV-1), and vesicular stomatitis virus (VSV), as well as a replication-competent VSV/SARS-CoV-2 chimeric virus. While each surrogate virus exhibited subtle differences in the sensitivity with which neutralizing activity was detected, the neutralizing activity of both convalescent plasma and human monoclonal antibodies measured using each virus correlated quantitatively with neutralizing activity measured using an authentic SARS-CoV-2 neutralization assay. The assays described herein are adaptable to high throughput and are useful tools in the evaluation of serologic immunity conferred by vaccination or prior SARS-CoV-2 infection, as well as the potency of convalescent plasma or human monoclonal antibodies.


Asunto(s)
Anticuerpos Neutralizantes/análisis , Anticuerpos Antivirales/análisis , Betacoronavirus/inmunología , Infecciones por Coronavirus/inmunología , Inmunoensayo/métodos , Neumonía Viral/inmunología , Animales , Anticuerpos Monoclonales/inmunología , Anticuerpos Neutralizantes/sangre , Anticuerpos Antivirales/sangre , Betacoronavirus/genética , COVID-19 , Línea Celular , Quimera/genética , Quimera/inmunología , Chlorocebus aethiops , Infecciones por Coronavirus/virología , Células HEK293 , VIH-1/genética , VIH-1/inmunología , Humanos , Pruebas de Neutralización/métodos , Pandemias , Neumonía Viral/virología , Recombinación Genética , SARS-CoV-2 , Glicoproteína de la Espiga del Coronavirus/genética , Glicoproteína de la Espiga del Coronavirus/inmunología , Células Vero , Virus de la Estomatitis Vesicular Indiana/genética , Virus de la Estomatitis Vesicular Indiana/inmunología
9.
Nature ; 584(7821): 437-442, 2020 08.
Artículo en Inglés | MEDLINE | ID: covidwho-606946

RESUMEN

During the coronavirus disease-2019 (COVID-19) pandemic, severe acute respiratory syndrome-related coronavirus-2 (SARS-CoV-2) has led to the infection of millions of people and has claimed hundreds of thousands of lives. The entry of the virus into cells depends on the receptor-binding domain (RBD) of the spike (S) protein of SARS-CoV-2. Although there is currently no vaccine, it is likely that antibodies will be essential for protection. However, little is known about the human antibody response to SARS-CoV-21-5. Here we report on 149 COVID-19-convalescent individuals. Plasma samples collected an average of 39 days after the onset of symptoms had variable half-maximal pseudovirus neutralizing titres; titres were less than 50 in 33% of samples, below 1,000 in 79% of samples and only 1% of samples had titres above 5,000. Antibody sequencing revealed the expansion of clones of RBD-specific memory B cells that expressed closely related antibodies in different individuals. Despite low plasma titres, antibodies to three distinct epitopes on the RBD neutralized the virus with half-maximal inhibitory concentrations (IC50 values) as low as 2 ng ml-1. In conclusion, most convalescent plasma samples obtained from individuals who recover from COVID-19 do not contain high levels of neutralizing activity. Nevertheless, rare but recurring RBD-specific antibodies with potent antiviral activity were found in all individuals tested, suggesting that a vaccine designed to elicit such antibodies could be broadly effective.


Asunto(s)
Anticuerpos Neutralizantes/inmunología , Anticuerpos Antivirales/inmunología , Betacoronavirus/inmunología , Infecciones por Coronavirus/inmunología , Neumonía Viral/inmunología , Adolescente , Adulto , Anciano , Anticuerpos Monoclonales/análisis , Anticuerpos Monoclonales/inmunología , Anticuerpos Neutralizantes/análisis , Anticuerpos Antivirales/análisis , Especificidad de Anticuerpos , COVID-19 , Vacunas contra la COVID-19 , Infecciones por Coronavirus/prevención & control , Ensayo de Inmunoadsorción Enzimática , Femenino , Humanos , Masculino , Persona de Mediana Edad , Pruebas de Neutralización , Pandemias , SARS-CoV-2 , Glicoproteína de la Espiga del Coronavirus/química , Glicoproteína de la Espiga del Coronavirus/inmunología , Vacunas Virales/inmunología , Adulto Joven
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