Previous vaccines and masks may hold down COVID-19, some researchers say – CNN Philippines

(CNN) – As US leaders work to control the spread of coronavirus, researchers across the country — and globe — are working to answer the mysteries that remain around infections.
One of those mysteries: why the experience can be so different from person to person. One expert says the answer may involve looking at previous vaccines individuals have had.
“When we looked in the setting of Covid disease, we found that people who had prior vaccinations with a variety of vaccines — for pneumococcus…

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