The number of nursing homes publicly reporting cases of covid-19 has doubled in the past week, with more than 1 in 6 facilities nationwide now acknowledging infections among residents or staff, a Washington Post analysis of state and federal data found.

The rise is driven in part by newly released information about previous novel coronavirus infections from states including Michigan, Maryland, Kentucky and South Carolina. Some states have not yet publicly released the names of affected nursing homes.

In five states - Maryland, Massachusetts, Connecticut, Georgia and New Jersey - the virus has struck a majority of nursing homes, the data shows. In New Jersey, second only to New York in total number of confirmed coronavirus cases, health officials have reported infections at 80 percent of the state's homes.
Maryland released a list earlier this week of more than 130 nursing homes with cases, about 60 percent of homes in the state. Overall, Maryland reported 185 long-term care facilities with cases.