We can speculate that the minority of people with a history of detected infections, who got those T cells, never had their infections detected again. Suprisingly, they say that nucleoprotein is abundantly produced in cells that secret mature virions User 12nb34, in the punishment_panic subreddit, 09 Oct 2023
SARS-CoV-2-specific T cell immunity in cases of COVID-19 and SARS, and uninfected controls User jimfam, in the Novel Coronavirus (COVID-19) subreddit, 28 May 2021
Over 50% of uninfected donors had T cells from past Coronaviruses which could provide some protection from Covid-19. Still there 17 years after infection. User worldnewsbot, in the News From Around The World subreddit, 15 Jul 2020
Over 50% of uninfected donors had T cells from past Coronaviruses which could provide some protection from Covid-19. Still there 17 years after infection. User kapetankuka, in the Reddit Science subreddit, 15 Jul 2020
SARS-CoV-2-specific T cell immunity in cases of COVID-19 and SARS, and uninfected controls User smaskens, in the COVID-19 subreddit, 15 Jul 2020
Over 50% of uninfected donors had T cells from past Coronaviruses which could provide some protection. Still there 17 years after infection. - peer-reviewed study User kapetankuka, in the Novel Coronavirus (COVID-19) subreddit, 15 Jul 2020