Local spread of coronavirus marks turning point in U.S.

U.S. public health officials have identified four "presumptive" coronavirus cases believed to have emerged from community transmission of the infection, signaling a turning point in strategies needed to contain the disease in the United States.

Local spread of coronavirus marks turning point in U.S.
U.S. public health officials have identified four "presumptive" coronavirus cases believed to have emerged from community transmission of the infection, signaling a turning point in strategies needed to contain the disease in the United States.