Diagnostic testing for SARS-CoV-2 is a critical component to the overall prevention and
control strategy for COVID-19. Countries should have a national testing strategy in place …

Antigen-detection in the diagnosis of SARS-CoV-2 infection: interim guidance, 6 October
2021 | Geneva; World Health Organization; 2021. (WHO/2019-nCoV/Antigen_Detection/2021.1) …