Hybrid Immunity Kept Omicron Deaths Low in Countries Where Millions Aren’t Fully Vaccinated

Wall Street Journal — March 5, 2022. “Hybrid immunity, which is some combination of having exposure to infection and immunization, has been high in [South and Southeast Asia],” said Ramanan Laxminarayan, director of the Center for Disease Dynamics, Economics and Policy, a public-health research organization based in Washington, D.C., and New Delhi.