Frequent Covid Tests Urged to Help Curb Spread of Delta Variant

The highly contagious delta variant has prompted some infectious disease physicians to call for ramped-up Covid-19 testing to prevent infected, vaccinated people from spreading the virus unknowingly.

“We need a lot more testing. And we need to think about how do we scale up testing in an effective way,” Carlos del Rio, executive associate dean and epidemiologist at Emory University, said. “Identifying people before they infect others, I think it’s critically important.”

The Centers for Disease Control and Prevention on Friday released findings that people infected with the delta variant in Cape Cod, Mass., carried similarly high loads of ...