What Can Ebola Immunity Teach us About COVID-19?

A landmark study of Ebola survivors could have big implications for COVID-19 research.
 
The Lancet Infectious Diseases study—focused on 117 survivors of the 2013–2016 West Africa outbreak—found that backup “killer T cells” and B cells that “memorize a specific battle plan” helped survivors maintain immunity for years after infection even without showing antibodies to the virus.
 
The findings suggest that not having antibodies doesn’t necessarily mean someone doesn’t have immunity.
 
Striking Finding: Some close contacts of survivors never had symptoms but had both antibodies and T cells for the virus, which could shift the general understanding of herd immunity.
 
The Guardian

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