Why would a vaccine be needed if we can do other things, like physical distancing and wearing masks, to prevent COVID-19 from spreading?

Stopping a pandemic requires using all the tools available to us. Vaccines are the first step in returning to a more normal life. Still, we need Coloradans to continue to use basic public health guidance, like physical distancing and mask wearing, until a vaccine is widely available and used by Coloradans.

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