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Articles on Virus transmission

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The best way to stop a contagious virus like COVID-19 is through a worldwide vaccination program. Patrick T. Fallon/AFP via Getty Images

Is COVID-19 here to stay? A team of biologists explains what it means for a virus to become endemic

Some viruses go extinct, while others stick around. The virus that causes COVID-19 seems likely to remain with us for the long term.
Vaccinated people are well protected from getting sick, but could they inadvertently transmit the coronavirus? Noam Galai/Getty Images Entertainment via Getty Images

Can people vaccinated against COVID-19 still spread the coronavirus?

The COVID-19 vaccines are a smash success. But that doesn’t mean they keep every vaccinated person completely free of the coronavirus.

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