This document summarizes current WHO guidance for public health surveillance of coronavirus disease 2019 (COVID-19) in humans caused by infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). New elements include: update of contact definitions, in line with latest contact tracing guidance update of detection strategies in line with updated version of WHO SARS-CoV-2 testing guidance reinfection evidence standardization and surveillance: molecular, genomic and immunological evidence of reinfection inclusion of clinical case definition of Post COVID-19 condition as defined by WHO definition of breakthrough infection