“Covid cases have dropped 77% in six weeks. Experts should level with the public about the good news. […] Antibody studies almost certainly underestimate natural immunity. Antibody testing doesn’t capture antigen-specific T-cells, which develop “memory” once they are activated by the virus. Survivors of the 1918 Spanish flu were found in 2008—90 years later—to have memory cells still able to produce neutralizing antibodies.”
By Marty Makary
Feb 18, 2021
https://www.wsj.com/articles/well-have-herd-immunity-by-april-11613669731