The Latest: Italy to start experimental immunity testing

The Latest on the coronavirus pandemic. The new coronavirus causes mild or moderate symptoms for most people. For some, especially older adults and people with existing health problems, it can cause more severe illness or death.TOP OF THE HOUR:— Italy to start immunity tests in early May.— Virus reaches “long plateau” in France, health agency chief says.— British foreign secretary says China must explain virus’ origins.— Illinois nursing home records 23