Amid an increase in reported human cases of the bird flu, health experts are warning of the potential for another pandemic in the United States. Health experts are currently urging the federal government to increase bird flu testing and authorize vaccines to prevent the deadly avian influenza A (H5N1) virus from rapidly spreading.

Dr. Dean Blumberg, an infectious disease expert, recently issued a warning on CNN, saying, “The virus may mutate and become more easily transmitted person-to-person, so the more this virus circulates, and specifically, co-circulates with human strains, that’s going to increase the odds of the virus evolving to more human-to-human transmission, and that of course, could signal another pandemic.”

During a Sunday appearance on CNN, Dr. Deborah Birx, who previously served as the White House’s COVID-19 response coordinator during President-elect Donald Trump’s first term in office, suggested that the number of human cases of the bird flu disease could be higher than what has been reported.

“If you go to the CDC website, you can see that they’re monitoring more than 10,000 exposures, but they’ve only tested 530,” Birx said. “What does that mean? That means we’re not testing enough, and we know from other viruses that a lot of the spread can be asymptomatic.”

Birx warned that the United States could face a “bigger threat” if the bird flu is able to “reassort” in an individual and mix with a human flu strain.

During a Sunday appearance on CBS News’ Face the Nation, former Baltimore Health Commissioner Leana Wen also warned about the danger of the bird flu in the United States. Wen urged the federal government to implement additional testing before the end of the Biden-Harris administration.

“We should have learned our lesson from COVID, that just because we aren’t testing, it doesn’t mean that the virus isn’t there,” Wen said. “It just means that we aren’t looking for it. We should be having rapid tests, home tests available to all farm workers, to their families.”

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Wen also urged the Biden-Harris administration to quickly have the Food and Drug Administration authorize the bird flu vaccine to protect “vulnerable people.”

“We don’t know what the Trump administration is going to be doing around bird flu if they have people coming in with anti-vaccine stances. Could they hold up vaccine authorization if they don’t want to know how much bird flu is out there?” Wen added. “Could they withhold testing? I mean, that’s a possibility, and I think the Biden administration, in the remaining days, should get testing and vaccines widely available so that at least it empowers state and local health officials and clinicians to do the right thing for their patients.”