You might have fewer antibodies now. But they’re better than the ones you started with. The focus on antibody counts alone actually does a disservice to our understanding of immunity, experts told me.

In early 2021, Qatar launched a mass immunization campaign with the mRNA-1273 (Moderna) 1 vaccine against coronavirus disease 2019 (Covid-19). 2 We assessed the persistence of real-world vaccine ...

It may not really be waning much — which means universal booster shots may do little good. By David Leonhardt Late last month, researchers in Israel released some alarming new Covid-19 data. The data ...