The U.S. grapples with its largest measles outbreak in over 30 years, putting its disease elimination status at risk if virus spread continues unchecked.

Some Alberta hospitals say the province's measles outbreak has forced them to triage patients in parking lots. Kathy Le on the surge in cases.

Infections of COVID-19 are growing or likely growing in half of the U.S. as of July 8, according to CDC estimates.