Age-Dependent Effects of COVID-19 Vaccine and of Healthcare Burden on COVID-19 Deaths, Tokyo, Japan.

The article discusses research on age-dependent effects of COVID-19 vaccine and effect of healthcare burden on COVID-19 deaths in Tokyo, Japan from January 1 to August 31, 2021. The study estimated COVID-19 vaccine effectiveness (VE) against death and time-varying case-fatality risk (CFR) in SARS-CoV-2-positive persons according to age group using data published by the Tokyo Metropolitan Government. Research results compare the effect of healthcare burden on CFR in older and younger age groups.