I'm in New York City. Asymptomatic Cases: The percentage of positive cases who did not experience any symptoms. Asymptomatic COVID COVID-19: What proportion are asymptomatic? - The Centre for … Current estimates from the Centers for Disease Control and Prevention (CDC) involve what is known as the infection fatality ratio (IFR) of COVID-19 in the United States. Matt Woodley. A substantial proportion of infections only lead to mild symptoms or are asymptomatic, but the proportion and infectivity of asymptomatic infections remains unknown. We therefore conducted a systematic review and meta-analysis of COVID-19 literature reporting laboratory-confirmed infections to estimate the percentage of SARS-CoV-2 infections that are truly asymptomatic. Asymptomatic Searching for people who are asymptomatic yet infectious is like searching for needles that appear and reappear transiently in haystacks, particularly when rates are falling. By Neha Mathur Jan 16 2022 Reviewed by Benedette Cuffari, M.Sc. COVID