The New York Times
Studies touting the durability and strength of natural immunity are hobbled by one crucial flaw. They are, by definition, assessing the responses only of people who survived Covid-19. The road to natural immunity is perilous and uncertain, Dr. Nussenzweig said.
Sofia Landi and Winrich Freiwald, two of the authors of the report, talk about the research, and what it may tell us about how the brain and memory are organized.
Jean-Laurent Casanova believes that anyone who gets severely ill or dies from COVID is “immunodeficient” by definition—even if there is no current explanation for why they fared so poorly. Researchers say that continued advances in genetic sequencing will help unravel some of that mystery.