Colder weather in the fall will likely drive more people indoors, where health experts say COVID-19 spreads more easily. .

Redfield said the CDC is urging people to get a flu shot, and the agency has purchased an extra 10 million doses of the vaccine — compared with the typical 500,000 — to make sure states have enough to cover uninsured adults.

Redfield said conditions will depend on whether people follow the guidelines: wearing face masks, staying six feet away from others, washing hands often with soap and warm water and avoiding large crowds, especially indoors.