Coronavirus: 3 reasons why confirmed cases are on the rise again

Despite the U.S. vaccine rollout improving significantly, the daily number of confirmed COVID-19 cases is on the rise yet again after dropping precipitously from January highs.

The latest 7-day moving average of confirmed cases was at 60,425 on March 27, and the U.S. is continuing to see an average of roughly 50,000 new cases a day.

And according to Dr. Calvin Sun, an NYC-based emergency medicine physician, there are three main factors driving this recent uptick: the virus mutating, the rolling back of safety measures, and the recent increase in travel.

“One is the variants,” Sun said on Yahoo Finance Live (video above). “People are getting reinfected again. Do you know how many times I’ve been hearing ‘not again’?”

A recent study found that less than 1% of adults report getting reinfected with the virus. But for those who do get reinfected, they could experience more severe symptoms the second time around if they're positive for one of the several variants (mutant strains).

The second reason for the surge in cases "is a half-hearted response,” Sun said. “Mask mandates only do so much. Not all businesses are forcing it, and only half of them are or three-quarters. That’s like only vaccinating 80% of the population. That 20% is going to get reinfected, create a new variant, recombination, and then we have to start all over again. Not all of us are safe until everybody is safe.”

Mississippi, Texas, Alabama, Arizona, West Virginia, and Connecticut all rolled back restrictions like mask mandates and indoor capacity limits within the last month. (Other states like Georgia and Alaska never had mask mandates to begin with.) As restrictions ease, Connecticut is among the top five in terms of most daily cases per capita.

'When something bad happens, that's on you'

The third factor in the recent rise in cases, according to Sun, is people traveling a lot more.

“Most of the people I’ve been telling are positive since last Thursday and Friday [have said] ‘I was on a plane,'" Sun said. "Where did you come from? And it’s usually one of four or five states.”

As more places roll back their restrictions, the number of travelers has increased substantially.

The CDC still recommends not traveling, both domestically and internationally. Nevertheless, the latest TSA data showed that 1,406,234 traveled in the U.S. on Monday, one of the highest numbers since the pandemic began.

CHICAGO, ILLINOIS - MARCH 16: Travelers arrive for flights at O'Hare international Airport on March 16, 2021 in Chicago, Illinois. On March 12, the TSA screened more than 1.3 million travelers, the highest number since the start of the pandemic.  (Photo by Scott Olson/Getty Images)
Travelers arrive for flights at O'Hare international Airport on March 16, 2021 in Chicago. (Photo by Scott Olson/Getty Images) · Scott Olson via Getty Images

“That’s a decision they have to live with,” Sun said. “I always tell them you can do whatever you want. No one is forcing you to stay home. No one is forcing you to quarantine. That is based on your ethical guidelines and what you feel is right or wrong but when something bad happens, that’s on you when you infect other people.”