"Infection with this coronavirus does not necessarily generate lifetime immunity," but antibodies are only part of the story, said Dr. The immune system remembers how to make fresh antibodies if needed and other parts of it also can mount an attack, he said. Antibodies are proteins that white blood cells called B cells make to bind to the virus and help eliminate it. The earliest ones are fairly crude but as infection goes on, the immune system becomes trained to focus its attack and to make more precise antibodies. That's true, Creech said, but other parts of the immune system also help confer protection.

Source: CBC News July 21, 2020 18:55 UTC