Sixty-nine percent of parents are at least somewhat concerned that their children will face setbacks in school because of the coronavirus pandemic, including 42% who say they’re very or extremely worried about it, according to a new poll from The University of Chicago Harris School of Public Policy and The Associated Press-NORC Center for Public Affairs Research.

Nearly as many, 64%, say they are at least somewhat concerned that in-person instruction will lead to more people being infected, but it’s only 33% who say they are very or extremely worried about the risk.

That tension reflects the fears of a nation on the cusp of a widespread return to classroom teaching. More than a year after the pandemic started, more schools are now opening their doors to students or plan to do so in coming weeks.