The development of COVID-19 vaccines has helped limit the extent of the pandemic, which
over the past 2 years has claimed the lived of millions of people. The Moderna and Pfizer …

Neutralizing antibodies are considered a correlate of protection against SARS-CoV-2
infection and severe COVID-19, although they are not the only contributing factor to …

Background With the surge of new SARS-CoV-2 variants, countries have begun offering
COVID-19 vaccine booster doses to high-risk groups and, more recently, to the adult …

This was a retrospective cohort study, which aimed to investigate the factors associated with
hesitancy to receive a third dose of a coronavirus disease 2019 (COVID-19) vaccine. A …

Background We report updated safety, efficacy, and immunogenicity of AZD1222 (ChAdOx1
nCoV-19) from an ongoing phase 3 trial. Methods Adults at increased risk of SARS-CoV-2 …

Objective: To determine risk factors for the development of long coronavirus disease 2019
(COVID-19) in healthcare personnel (HCP). Methods: We conducted a case–control study …

Vaccine hesitancy is considered a major barrier to achieving herd immunity against COVID-
19. While multiple alternative and synergistic approaches including heterologous …

Designing and producing an effective vaccine is the best possible way to reduce the burden
and spread of a disease. During the coronavirus disease 2019 (COVID-19) pandemic, many …

ABSTRACT COVID-19 vaccine booster shots are necessary to provide durable immunity
and stronger protection against the emerging SARS-CoV-2 variants. As a major platform for …

Background To date, only a few studies reported data regarding the development of
mucosal immune response after the BNT162b2-booster vaccination. Methods Samples of …