The research says that some people may have T-cells which promote a more robust response to the virus, if their antibodies don't succeed. From the article belo

The research says that some people may have T-cells which promote a more robust response to the virus, if their antibodies don't succeed. From the article below "This means that infected people who did not develop symptoms or antibodies may still be immune to Covid-19 via T-cells memory" It does a good job of explaining the difference between immunity acquired by antibodies vs T-cells. https://medium.com/microbial-instincts/if-antibodies-fall-short-of-covid-19-immunity-call-the-t-cells-abeb5cae6832 https://medium.com/microbial-instincts/if-antibodies-fall-sh...