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Researchers showed that B cells evolve after COVID-19 vaccination to help improve protection against SARS-CoV-2 over time.
Cancer patients undergoing treatment and those with suppressed immune systems eye the future—and the COVID pandemic’s wane—warily.
Studies evaluate the impact of COVID-19 infection, treatments and vaccination in this uniquely vulnerable population.
The findings suggest boosters not only lengthen immunity but help broaden and strengthen the immune response.
Evidence is growing that contracting SARS-CoV-2 is generally as effective as vaccination at preventing COVID-19.
People who received the Moderna COVID-19 vaccine had strong immune memory of SARS-CoV-2 six months after vaccination.
What protects most children from becoming seriously ill? And why does that protection sometimes fail?
About half of people hospitalized with COVID-19 had antibodies that could mistakenly attack the body’s own proteins and tissues.
Scientific evidence appears to show that vaccine-induced immunity is stronger than what the body generates after natural infection.
Bamlanivimab and etesevimab may be given to people with mild to moderate COVID-19 who are at high risk for progression to severe disease.
More than 95% of people who recovered from COVID-19 had durable immune system memory up to eight months after infection.
Another vaccine, from Novavax, was 89% effective in a U.K. trial, but both were less potent against the South African coronavirus mutation.
Long-lived memory immune cells continue to provide protection even after antibody levels drop.
People who have had evidence of a prior infection appear to have some degree of protection against being reinfected with the virus.
Immune cells called T cells helped prevent reinfection and may be especially important if antibody levels are low or decline over time.
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