Vaccination

China's bet on homegrown mRNA vaccines holds back nation

China is trying to navigate its biggest coronavirus outbreak without a tool it could have adopted many months ago, the kind of vaccines that have proven to offer the best protection against the worst outcomes from COVID-19.

Diseases, Conditions, Syndromes

Herd immunity for Americans may be an elusive goal, experts say

(HealthDay)—While more than half of American adults have gotten at least one dose of a coronavirus vaccine, many scientists and public health experts now believe that herd immunity cannot be reached in the foreseeable future.

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