Why COVID-19 herd immunity may be closer than we think - MyNorthwest.com

It argues that if you look at the T cells — the cells that remember past infections — we will find that quite a few people have developed an immunity to COVID-19 without ever having had any symptoms.

“When we’re doing antibody testing, it doesn’t capture these antigen specific T cells or memory T cells once they’re activated by the virus.

But the current COVID-19 infection fatality rate is 0.23%.

In other words, the testing that’s been done is testing the antibodies that are currently fighting the infection.

But when we’re testing people to see if they have a response to the vaccination, we’re testing for antibodies, we’re not testing for T cell activity.