3/ While antibodies against COVID-19 may only last months, T cell immunity can remain protective for years.

In a study of 23 people who survived SARS in 2003, every single one had memory T cells that recognized the SARS virus 17 years later. (Nature)https://t.co/4LCjGcj8u9

— James Todaro, MD (@JamesTodaroMD) August 10, 2020