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James Todaro, MD
@JamesTodaroMD
Vaccine scientists: "Antibodies against COVID-19 don't last. We need a vaccine to induce T-cell immunity"
Me: "Many people already have crossover T-cell immunity from common cold coronaviruses"
Vaccine scientists: "T-cells have no effect on herd immunity"
Me: "But...nevermind" //
One function of T-cells is to stimulate B-cells to produce antibodies. But T-cells can also fight off a virus even if you’re body doesn’t have the ability to generate antibodies by directly attacking and killing infected cells. //
James Todaro, MD
·
Aug 10, 2020
Replying to @JamesTodaroMD
2/ The pervasive misconception is that we have zero immunity against COVID-19. Based on this flawed understanding, epidemiologists projected that herd immunity is not reached until 60-70% are infected.
This is almost certainly wrong.
Of course, the media ignores this research
James Todaro, MD
@JamesTodaroMD
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://nature.com/articles/s4158
4/ Moreover, blood samples from all 23 individuals showed “robust cross-reactivity” against SARS-CoV-2.
This can be called crossover immunity.
Crossover immunity is not limited to just people who were infected with SARS years ago though.
