The percentage of uninsured children in the U.S. has been in decline for years. But a new study by the University of Minnesota finds that it’s moving upward again. The rate increased across demographic groups, and the study estimates that some 4 million U.S. kids are now uninsured. Declining rates of both Medicaid enrollment and private coverage are driving the increase, and experts say the number of children without health insurance is likely to keep growing. 

Correction (May 3, 2019): An earlier version of this story mischaracterized the decline in children’s insurance enrollment. It has been corrected.