How COVID-19 Immunity Works at This Point in the Pandemic

(Time) When SARS-CoV-2 was a brand-new virus, it met little resistance in immune-naïve hosts—that is, us. Vaccines, boosters, and infections have increased our immunity to varying degrees. But how much protection do each of these provide at this point in the pandemic? Here’s what researchers are learning about how the human body reacts to COVID-19 and its vaccines and boosters.