Methods We conducted a retrospective, observational cohort study of 717 patients with PCR-
confirmed COVID-19 who were hospitalized at the National Centre of Infectious Diseases …

We aimed to summarize reliable medical evidence by the meta-analysis of all published
clinical trials that investigated the safety, tolerability, and immunogenicity of vaccine …

Background: Although multiple studies have revealed that coronavirus disease 2019
(COVID-19) vaccines can reduce COVID-19–related outcomes, little is known about their …

Objectives It is unclear whether patients with hypertension are more likely to be infected with
SARS-COV-2 than the general population and whether there is a difference in the severity of …

Since the declaration of Coronavirus-2019 (COVID-19) as a pandemic by the World Health
Organization (WHO), it was clear that vaccination is the best way to overcome it. Sinopharm …

Results As of December 6, 2020, we screened 342 registered COVID-19 vaccine clinical
trials (142 from ClinicalTrials. gov S2 and 200 from the WHO Clinical Trial database S3) …

Introduction SARS-CoV-2 is responsible for a large number of global COVID-19 cases.
Strategies such as social isolation, personal hygiene and frequent hand washing have been …

Background COVID-19 is rapidly spreading causing extensive burdens across the world.
Effective vaccines to prevent COVID-19 are urgently needed. Methods and findings Our …

Vaccines against coronavirus disease 2019 (COVID‐19) have been discovered within a
very small duration of time as compared to the traditional way for the development of …

Background Although COVID-19 vaccination decreases the risk of severe illness, it is
unclear whether vaccine administration may impact the prevalence of long-COVID. The aim …