Scientists believe they may have discovered why the novel coronavirus affects some people so much more than others.
Dr. Anthony Fauci, the nation’s leading infectious disease expert, said a new study could explain the extraordinary range that people experience with the novel coronavirus, from having no symptoms at all or a mild case to hospitalization or death.
The findings also offer new insights that could help in developing a vaccine by looking at T cells which help fight the virus. The study, funded by the National Institute of Allergy and Infectious Diseases which Fauci heads, is one of the first to identify T cell “cross reactivity” in individuals who have previously been exposed to one of the four endemic coronavirus strains, SARS or MERS.
Angela Rasmussen, a virologist at Columbia University, also explained the immune system in military terms, likening antibodies to infantry and T cells to cavalry. Fauci noted that, while T cells last much longer than antibodies, they do not last forever. The more recently an individual was infected with another type of coronavirus, the greater likelihood of some protection from COVID-19.
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