Population-based age-stratified seroepidemiological investigation protocol for coronavirus 2019 (COVID-19) infection 26 May 2020 | COVID-19: Surveillance, case investigation and epidemiological protocols Download (429.9 kB) CorrigendumArabicChineseFrenchRussian Spanish WHO Team WHO Headquarters (HQ) Editors World Health Organization Reference numbers WHO Reference Number: WHO/2019-nCoV/Seroepidemiology/2020.2 Copyright
