CNN  — 

Coronavirus infections in the United States passed 9 million on Friday with the virus spreading across the country at a faster rate than previously seen.

The US added 1 million new Covid-19 cases only 14 days after the nation hit 8 million cases, and multiple states continue reporting their highest daily case counts since the pandemic began, according to data compiled by Johns Hopkins University This is the fastest the country has recorded 1 million new cases since the pandemic began.

The latest surge of cases appears to be driven by patients with no symptoms, said Dr. Robert Redfield, the director for the US Centers for Disease Control and Prevention.

A “silent epidemic” of asymptomatic Covid-19 infections is “moving amongst 12- to 30-year-olds” and then making the jump to older people, Redfield told SiriusXM Doctor Radio Reports on Friday.

“This is what is driving the expansion that we’re seeing in the outbreak across the country right now,” he said.

A positive diagnosis every second

Daily Covid-19 cases in the US hit a new high once again on Friday when health officials reported 91,744 cases, topping previous high of 88,521 cases on Thursday. The top five Covid-19 case days have all occurred in the last eight days.

In total, the US has 9.03 million cases and 229,594 deaths due to the virus, according to Johns Hopkins.

In Florida, health officials reported more than 5,500 cases on Friday, pushing the state’s case count past 800,0000 cumulative cases. Florida is the third state to surpass that mark, behind California and Texas, according to Johns Hopkins data.

Nine other states reported their record high single-day of new cases ever on Thursday, Johns Hopkins reported: Illinois, Indiana, Maine, Michigan, Minnesota, New Mexico, North Carolina, North Dakota and Ohio.

“Today, we now have one person being diagnosed (with) coronavirus every second,” former Baltimore Health Commissioner Dr. Leana Wen said Friday. “We have one American dying of coronavirus every two minutes, and that number is increasing.”

Wen, an emergency medicine physician, told CNN’s Wolf Blitzer that she is most concerned about the rate of test positivity. In some states, she said one in two people being tested are testing positive.

“That means that we’re not doing nearly enough testing, and that every person who tests positive is a canary in a coal mine,” she said. “There are almost certainly to be many more, dozens of other cases, that we’re not detecting, and that escalation is going to increase in the weeks to come.”