By Sola Ogundipe & Chioma Obinna No less than 1 in 5 individuals in Lagos, Enugu, and the Nasarawa States have ever been infected with SARS-CoV-2 (COVID-19 virus), even as more Nigerians are still at risk, according to findings of COVID-19 Household Seroprevalence Surveys in Four States of Nigeria. The surveys were conducted by the Nigeria Centre for Disease Control, NCDC, the Nigeria Institute of Medical Research, NIMR, and their partners, between September and October 2020. They were designed to improve the estimated burden of COVID-19 infection in the country and provide a more detailed estimate of the extent of infection with the SARS-CoV-2 virus which causes COVID-19.