When COVID Skeptics Take Charge of Public Health

What happens when someone who spent years challenging the scientific establishment suddenly gets to run it? Jay Bhattacharya's rapid ascent from pandemic contrarian to America's most powerful health official offers a real-time answer to that question.

Just a year ago, Bhattacharya was primarily known for co-authoring the Great Barrington Declaration—a 2020 open letter that downplayed COVID risks and called for reopening society before vaccines arrived. Health experts widely condemned this approach as dangerous. Today, he wields unprecedented power over US health policy, serving as both National Institutes of Health director and acting Centers for Disease Control and Prevention chief—a dual role never before attempted.

The Trust Restoration Project

Bhattacharya's tenure as acting CDC director will likely be brief; Donald Trump reportedly plans to name a permanent replacement soon. But his first email to CDC staff revealed his agenda: federal decisions during the pandemic "broke the public's trust," and "acknowledging this reality is a necessary step toward renewal."

That "renewal" has been underway for months through what can only be described as institutional upheaval. Since Robert F. Kennedy Jr. took over as Health and Human Services secretary, thousands have been pushed out of the CDC. The agency's independent vaccine advisory group, the Advisory Committee on Immunization Practices (ACIP), was entirely dismissed and replaced with more anti-vaccine members. Several CDC vaccine recommendations have been stripped down "as far as they can go without affecting coverage guarantees" from insurers, according to Yale's vaccine policy expert Jason Schwartz.

The COVID Vaccine Reckoning

Bhattacharya remains steadfast in his pandemic-era positions. More than five years after becoming a vocal lockdown opponent, he continues relitigating those views across media platforms. While lockdowns may be a moot policy point now, COVID vaccines—which remain deeply unpopular among Trump's Republican base—present a politically palatable target.

For years, Bhattacharya has argued that widespread COVID vaccination policies violated "informed consent rights" and were "dangerous for public health." He's disputed abundant evidence of vaccine effectiveness and safety, claiming that immunity from COVID infection "is stronger and longer lasting than vaccine-induced immunity." Following his remade ACIP's advice, the CDC recently stopped recommending COVID shots for all Americans, now suggesting people consult physicians first.

At ACIP's next meeting later this month, the committee is scheduled to discuss COVID vaccines again—this time focusing on potential "injuries" from the shots. While COVID vaccines do have side effects, serious consequences remain very rare, and the shots still powerfully protect against severe disease, especially for high-risk populations.

The Measles Test Case

Johns Hopkins immunologist and health security expert Gigi Gronvall worries that Bhattacharya's approach to previous outbreaks could color the CDC's response to current threats. The biggest concern is measles, which has sparked thousands of US cases since early 2025 and may soon be declared endemic again.

Bhattacharya has shown some departure from Kennedy on measles vaccination. During his confirmation hearing, he said he was convinced by data showing no connection between the MMR vaccine and autism—a sentiment Kennedy refused to convey. In January, Bhattacharya described his distress that MMR vaccine uptake was "too low" and reportedly offered to publicly encourage parents to vaccinate their children.

Some within the agency greeted this announcement with gratitude, but outside experts note that such reactions only highlight how low standards have been set. While Bhattacharya has correctly noted that the measles vaccine is more powerful than the COVID one, containing measles outbreaks requires substantial investment in contact tracing, quarantines, and public health messaging that could restrict people's movements—all potentially conflicting with his laissez-faire sensibilities.

Rewriting History in Real Time

The Great Barrington Declaration suggested maintaining a relatively open society could keep deaths low while limiting other harms. But it also implicitly accepted a level of suffering and death that most public health professionals found untenable—a framework that could easily translate to today's epidemic responses.

Santiago Enrique Sanchez, a Stanford M.D.-Ph.D. student who has closely followed Bhattacharya's career, observes that he seems bent on "rewriting all of history retroactively to prove he was right all along." Even if his CDC tenure proves brief, Bhattacharya appears eager to force the agency to acknowledge his version of reality while he's in charge.