There are now more than 13 million confirmed coronavirus cases worldwide, according to Johns Hopkins University.

More than a quarter of that total is found in the United States, and that percentage is likely to keep rising, according to researchers.

 

Most U.S. states are seeing new weekly cases rise, and health experts expect that trend to continue. "I don't see how this ends.  These numbers will keep going up, we'll go way past 100,000 new cases per day," says Dr. Peter Hotez, of Baylor College of Medicine.

Many of those new cases will be from the younger part of the population. Research published this week in the Journal of Adolescent Health says roughly a third of 18- to 25-year-olds are at risk of severe COVID-19. "You go to school, you're going to come in contact with more people, so even if they're transmitting at a lower rate than adults it may get washed out or increased essentially because they have more contacts," says Dr. Sanjay Gupta, CNN Chief Medical Correspondent.

Amid the crisis, the Trump Administration is pushing for schools to reopen this year.

Some teachers and parents are concerned. "For the first time in my 17-year career I'm scared. And I'm not scared because of curriculum. And I'm not scared because of changes. I'm scared for my own safety and for my children's safety," says Sara Voss, an elementary school teacher.