Tests for Covid-19 antibodies are now available, but news reports suggest—and some physicians are advising their patients—that antibodies may not provide immunity. This assertion defies generations of immunology research and is a political attack on reliable tests.
Here’s how the immune system works: On viral infection, it reacts with two surges, “innate” and “adaptive” immunity. The innate response comes within minutes to hours and triggers alarms that result in effects across the body such as fever. Tissues and cells produce…
