Post-infection immunity is similar or even superior to the protection bestowed by COVID-19 vaccines, according to a new study published by The Lancet.
In the study, post-infection protection—known widely as natural immunity—was strong and remained significant over time, researchers found. Against the Wuhan, Alpha, and Delta variants, the protection against reinfection was 85 percent at four weeks, 78 percent at 40 weeks, and 55.5 percent at 80 weeks.
