JOHANNESBURG, Jan 11 (Reuters) – Preliminary findings from two South African clinical trials suggest the Omicron coronavirus variant has a much higher rate of “asymptomatic carriage” than earlier variants, which could explain why it has spread so rapidly across the globe. The studies – one of which was carried out […]
Abstract Objective To assess the diagnostic test accuracy of two rapid antigen tests in asymptomatic and presymptomatic close contacts of people with SARS-CoV-2 infection on day 5 after exposure. Design Prospective cross sectional study. Setting Four public health service covid-19 test sites in the Netherlands. Participants 4274 consecutively included close contacts (identified through test-and-trace […]
A 2-dose regimen of the BNT162b2 vaccine (Pfizer-BioNTech) against SARS-CoV-2 was authorized in December 2020 based on reported 94.8% efficacy.1 Although an association between vaccination and a reduction in symptomatic disease has been well described, an association with asymptomatic infection remains unclear.2,3 Methods In March 2020, St Jude Children’s Research Hospital […]
The US Food and Drug Administration (FDA) has issued an emergency use authorization (EUA) for a screening device that identifies biomarkers that may indicate asymptomatic SARS-CoV-2 infection in people ages 5 and older. The Tiger Tech COVID Plus Monitor (Tiger Tech Solutions, Inc) is designed for use after a temperature […]
