Events Like Trump Rally Are ‘Perfect Storm’ for Viral Spread, Experts Say

The coronavirus won’t be loosening its grip on the United States any time soon, leading infectious disease experts said on Sunday. They are also uncertain how the viral spread will be affected by the patchwork of states reopening businesses and by large events like protests and President Trump’s upcoming campaign rallies.

“This virus is not going to rest” until it infects about 60 percent to 70 percent of the population, Dr. Michael T. Osterholm, the director of the Center for Infectious Disease Research and Policy at the University of Minnesota, said on “Fox News Sunday.”

Experts have estimated that without a vaccine, about 70 percent of the population will need to be infected and develop immunity in order to stop the virus’s spread, a concept called herd immunity. The number of confirmed American cases now exceeds 2 million, less than 1 percent of the U.S. population, according to the Johns Hopkins Covid-19 Dashboard and the Centers for Disease Control and Prevention.

Joseph Fair, a virologist and epidemiologist who recently recovered from a serious bout of Covid-19, echoed that view on NBC’s “Meet the Press.”

“Once it gets so ingrained in the population, there’s not a point where we can come back from that other than having a vaccine in place,” said Dr. Fair, who is a medical contributor to NBC News.

Dr. Osterholm said that recent data show the rate of new cases has been level in eight states, increasing in 22 states and decreasing in the rest. The increase is not simply because of more widely available testing, the experts said, noting that an especially worrisome development is a rise in hospitalizations in several states.

“At this point, hospitals are at risk of getting overwhelmed and that is basically signaling to me that those states are already behind,” said Dr. Nahid Bhadelia, medical director of the special pathogens unit at Boston University School of Medicine, who also appeared on the NBC News program on Sunday.