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Hum Vaccin Immunother ; 18(1): 2039017, 2022 12 31.
Article in English | MEDLINE | ID: covidwho-1730547


Assessment of safety of COVID-19 vaccines is an ongoing process. This study aims to explore long-term adverse events reported by physicians and dentists who received at least two COVID-19 vaccine doses. A group of physicians and dentists were invited to complete a validated questionnaire that was composed of items on: socio-demographics, medical history, administered vaccines, and long-term adverse events (LTAE). Data of a total of 498 practitioners were included. Age ranged from 22 to 71 years (mean age= 35.75 ± 11.74) with a female majority (N = 348, 69.9%). The most frequently administered vaccines were Pfizer-BioNtech, Sinopharm and AstraZeneca vaccines. A total of 80 (16.0%) participants reported LTAEs which were mainly fatigue, menstrual disturbances, myalgia, arthralgia, dizziness, and headache (N = 32, 15, 8, 6, 4, and 4, respectively). There was no statistically significant association between LTAEs and: age, gender, or medical history (P > .05). The collective symptoms of fatigue, myalgia, arthralgia, dizziness, and headache were significantly associated with Sinopharm vaccine (P = .04). This was further confirmed by general linear multivariate model analysis. Less than 20% of COVID-19 vaccine recipients may complain of LTAEs that are mostly fatigue-related. It seems that factors such as age, gender, and medical status play a negligible role in development of these AEs. On the other hand, Sinopharm vaccine showed the highest significant association with these AEs followed by AstraZeneca vaccine.

COVID-19 , Physicians , Adult , Aged , Arthralgia/chemically induced , Arthralgia/epidemiology , COVID-19/prevention & control , COVID-19 Vaccines/adverse effects , Dentists , Dizziness , Fatigue/chemically induced , Fatigue/epidemiology , Female , Headache/chemically induced , Headache/epidemiology , Humans , Jordan , Middle Aged , Myalgia/chemically induced , Myalgia/epidemiology , SARS-CoV-2 , Saudi Arabia , Young Adult
Biomed Pharmacother ; 147: 112650, 2022 Mar.
Article in English | MEDLINE | ID: covidwho-1635955


BACKGROUND: The objective of the present work was to assess the reactogenicity and immunogenicity of heterologous COVID-19 vaccination regimens in clinical trials and observational studies. METHODS: PubMed, Cochrane Library, Embase, MedRxiv, BioRxiv databases were searched in September 29, 2021. The PRISMA instruction for systemic review was followed. Two reviewers independently selected the studies, extracted the data and assessed risk of bias. The quality of studies was evaluated using the New Castle-Ottawa and Cochrane risk of instrument. The characteristics and study outcome (e.g., adverse events, immune response, and variant of concern) were extracted. RESULTS: Nineteen studies were included in the final data synthesis with 5 clinical trials and 14 observational studies. Heterologous vaccine administration showed a trend toward more frequent systemic reactions. However, the total reactogenicity was tolerable and manageable. Importantly, the heterologous prime-boost vaccination regimens provided higher immunogenic effect either vector/ mRNA-based vaccine or vector/ inactivated vaccine in both humoral and cellular immune response. Notably, the heterologous regimens induced the potential protection against the variant of concern, even to the Delta variant. CONCLUSIONS: The current findings provided evidence about the higher induction of robust immunogenicity and tolerated reactogenicity of heterologous vaccination regimens (vector-based/mRNA vaccine or vector-based/inactivated vaccine). Also, this study supports the application of heterologous regimens against COVID-19 which may provide more opportunities to speed up the global vaccination campaign and maximize the capacity to control the pandemic.

COVID-19 Vaccines/therapeutic use , COVID-19/prevention & control , Immunogenicity, Vaccine , /therapeutic use , Arthralgia/chemically induced , /therapeutic use , Diarrhea/chemically induced , Fatigue/chemically induced , Fever/chemically induced , Headache/chemically induced , Humans , Immunization, Secondary , Injection Site Reaction/etiology , Myalgia/chemically induced , SARS-CoV-2 , Vaccination , Vaccines, Subunit/therapeutic use