The Supreme Court's decision to block the Biden administration's vaccine-or-test requirement for large private businesses is a "setback for public health," United States Surgeon General Vivek Murthy told "This Week" co-anchor Martha Raddatz on Sunday.

Raddatz reminded Murthy that before the omicron surge, he had said on "This Week" that the mandate "was necessary and appropriate.".

Raddatz pressed the surgeon general on the time it has taken to ramp up the availability of testing in the United States.

Noting the high number of breakthrough infections amid the omicron surge, Raddatz asked Murthy what percent positive U.S

While he didn't have a percentage breakdown for the current caseload, Murthy said being vaccinated and boosted vastly increases protection from symptomatic infection

"What we've seen from our data, from the United States and from other countries, is that if you are vaccinated and boosted, your level of protection against symptomatic infection is in the around 75 to 80% range," he said