A new report from South Korea throws into question an earlier finding regarding transmission by older children.
As the coronavirus spread on the Fort Apache reservation in Arizona, medical teams sought out residents who might have been exposed. The effort paid off in unexpected ways.
She and other top health officials in the Trump administration warn states of a deepening spread of the coronavirus, in both rural and urban areas.
Inadequate testing and protracted delays in producing results have crippled tracking and hampered efforts to contain major outbreaks.