With doctors saying the worst is ahead for Americans with the coronavirus outbreak, the push for social distancing is getting stronger.

Schools in more than 30 states shut their doors.

"As I've said many times, and I'll repeat it, the worst is just ahead for us," says Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases at the National Institutes of Health.

The Centers for Disease Control and Prevention recommends canceling or postponing events that have 50 or more people for the next eight weeks. Large gatherings are banned in some states. Bars and restaurants in others are closing early. Illinois is shutting down to dine-in customers until the end of the month.

 "I tried earlier this week to appeal to everyone's good judgment to stay home to avoid bars, not to congregate in crowds," said Illinois Gov. J.B. Pritzker. "It's unfortunate that most people didn't take that seriously."

President Donald Trump says more testing will be available soon, and Americans shouldn't raid grocery store shelves.

"You don't have to buy so much," he said. "Take it easy, just relax."

And stay away from large crowds for the time being.

"It is how we respond to that challenge that's going to determine what the ultimate end point is going to be," said Dr. Fauci.