Two new studies suggest that natural immunity in individuals who have recovered from COVID-19 may be even stronger than previously believed.
A paper published in Nature on Monday by researchers from the Washington University School of Medicine in St. Louis found that cells in the bone marrow of people who had COVID-19 about one year earlier maintained a memory of the virus, allowing them to generate antibodies in case of reinfection. Another new paper, still under peer-review for publishing in Nature, found that these memory cells continue to mature and strengthen for as many as 12 months post-infection.
The evolution of those memory cells means they can tackle more and more variants of the virus over time.
Hellbound and Down 