Impact of the Coronavirus Disease 2019 (COVID-19) Vaccine on Asymptomatic Infection Among Patients Undergoing Preprocedural COVID-19 Molecular Screening

Article Medicine, General & Internal

Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK

Merryn Voysey et al.

Summary: The ChAdOx1 nCoV-19 vaccine has been shown to have an acceptable safety profile and effectiveness against symptomatic COVID-19, with higher efficacy observed in the group that received a low dose followed by a standard dose.

LANCET (2021)

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Article Medicine, General & Internal

SARS-CoV-2 Transmission From People Without COVID-19 Symptoms

Michael A. Johansson et al.

Summary: The study suggests that more than half of COVID-19 transmission may come from asymptomatic individuals, highlighting the importance of measures beyond identifying and isolating symptomatic cases in controlling the spread of the virus.

JAMA NETWORK OPEN (2021)

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Article Immunology

Postvaccination COVID-19 among Healthcare Workers, Israel

Sharon Amit et al.

Summary: Symptoms of COVID-19 can be mistaken for vaccine-related side effects, highlighting the importance of promptly testing for COVID-19 after vaccination. In a study of healthcare workers in Israel, a small percentage developed COVID-19 within 10 days of vaccination, emphasizing the need for vigilance in monitoring post-vaccination symptoms.

EMERGING INFECTIOUS DISEASES (2021)

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Letter Microbiology