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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.
Certain types of cancer treatment can lead to inadequate immune response.
Experts call for heightened precautions and better, more intensive therapies for COVID-19 patients with weakened immune systems.
Unvaccinated individuals were more than twice as likely to be reinfected with COVID-19 than those who were fully vaccinated.
Response to natural SARS-CoV-2 infection suggests HIV-positive people can also respond well to COVID-19 vaccines.
Gaps in COVID-19 vaccine uptake are starting to show, especially in rural America.
Many experts argue that COVID-19 cannot be curbed without vaccinating children. But others aren’t so sure.
Scientific evidence appears to show that vaccine-induced immunity is stronger than what the body generates after natural infection.
Research suggests protective effect of natural infection or vaccination is likely to be persistent.
While the United States is getting closer to this point, most health experts caution, it still has ground to cover.
Natural immunity and vaccine responses may be weaker in people with immune suppression, so they should get their second dose promptly.
The coronavirus vaccines are safe and should be effective even for people with advanced cancer.
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.
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