Obama: Keep social distancing for the sake of "our medical heroes"

• Social distancing is intended to "flatten the curve," or reduce the rate of hospitalizations so that the health care system isn't overwhelmed.

What he's saying: "These are the burdens our medical heroes already face in NYC," Obama tweeted, linking to a New Yorker article about "the growing chaos" inside New York hospitals.

• "It's only going to get harder across the country. Another reason to maintain social distancing policies at least until we have comprehensive testing in place. Not just for our sake—for theirs."

Go deeper: Doctors and nurses urge people to stay home