A small yellow ribbon pin became an act of defiance inside the Centers for Disease Control and Prevention in summer 2025.
Dr. Demetre Daskalakis, then Director of the National Center for Immunization and Respiratory Diseases, bought a box of these ribbons on June 11 and quietly distributed them to career senior leaders at the CDC. The yellow ribbon—long associated with hostages and captivity since the 1979-1981 Iran hostage crisis—took on new meaning within the walls of America’s premier public health institution.
For Daskalakis and his colleagues, the symbolism was clear and deliberate: they were hostages. Not to foreign captors, but to what they described as political ideology overriding scientific expertise. Science itself was being held captive, its voice silenced within an institution built on evidence and research.
The Context
The ribbon protest emerged during a period of unprecedented upheaval at federal health agencies. Robert F. Kennedy Jr., a longtime vaccine skeptic and critic of public health institutions, became Secretary of Health and Human Services in January 2025 under President Donald Trump’s second administration. Kennedy had built a career questioning vaccine safety and promoting what mainstream scientists consider pseudoscience.
Within months, Kennedy began reshaping vaccine policy in ways that alarmed career scientists. In late May 2025, HHS removed pregnant women and healthy children from COVID-19 vaccine recommendations—a decision made without consulting CDC scientists or following standard advisory processes. The American Academy of Pediatrics filed a lawsuit alleging these changes violated federal law governing how such decisions must be made.
In early June 2025, Kennedy took an even more dramatic step: he fired all 17 members of the CDC’s Advisory Committee on Immunization Practices (ACIP), the independent expert panel that had guided U.S. vaccine policy for decades. He replaced them with handpicked members who shared his skepticism about vaccines. Former CDC officials and pediatricians described the mass firing as “an unmitigated public health disaster.”
The new panel quickly began questioning long-established vaccination practices, including examining whether to split up the combined measles-mumps-rubella vaccine into separate shots—a move experts warned would lead to more missed vaccinations and require years to develop.
In his words:
The regime of Robert F. Kennedy, Jr. over public health has left CDC and other institutions crippled by ideologic and political attacks on science. After Kennedy made changes to the vaccine schedule for children and pregnant people without consulting CDC scientists in May 2025, it was increasingly clear that he had no interest in experts. None had ever briefed him on any topic. This was not normal. CDC was feeling like a prison with scientists being held hostage, caged by silence and the active disdain of a man who had built his career as a grifter and pseudoscience messiah. On June 11, I bought a small box of yellow ribbons to represent the hostages trapped at CDC. Science was being held hostage. Scientists were jailed in a prison of silence. I distributed these yellow ribbons to the career senior leaders at CDC and at the National Center for Immunization and Respiratory Diseases. After resigning on August 28, 2025, out of ethical obligation to science and the public, I continue to wear this pin as an act of defiance and a vigil for the freedom of scientific voices, hoping its legacy will inspire courage and advocacy in public health.
The Strategy
Daskalakis’s yellow ribbon campaign was a quiet act of solidarity and witness. Unlike public protests or media campaigns, this was an internal gesture—a way for scientists who felt they couldn’t speak freely to signal to each other that they weren’t alone in their concerns.
The strategy reflected the constrained position of career civil servants. Federal employees face restrictions on political activity and can face retaliation for public criticism of their agencies. The ribbons allowed CDC staff to protest without words, to mark their ethical position without risking their jobs—at least initially.
It was a deliberate historical reference. The yellow ribbon as a symbol of captivity has roots in the Iran hostage crisis, when Americans wore ribbons to show solidarity with 52 diplomats and citizens held for 444 days. By invoking this imagery, Daskalakis framed the situation as one of illegitimate detention—scientists prevented from doing their jobs properly, held hostage by an administration that valued ideology over expertise.
The Breaking Point
The yellow ribbon protest preceded a dramatic rupture at CDC. On August 27, 2025, the White House moved to fire CDC Director Susan Monarez after she reportedly clashed with Kennedy over his vaccine policies. The same day, three top CDC officials resigned in protest, including Daskalakis, Deputy Director Dr. Debra Houry, and Dr. Daniel Jernigan, director of the National Center for Emerging and Zoonotic Infectious Diseases.
Daskalakis’s resignation letter was scathing. “I am unable to serve in an environment that treats CDC as a tool to generate policies and materials that do not reflect scientific reality and are designed to hurt rather than to improve the public’s health,” he wrote. He described the breakdown of the “firewall between science and ideology” and condemned what he characterized as “radical non-transparency” and “unskilled manipulation of data to achieve a political end.”
Notably, Daskalakis clarified that the recent shooting at CDC headquarters—where a gunman who believed he’d been injured by COVID-19 vaccines killed a police officer—was not his reason for leaving. Instead, he invoked his grandfather, who had stood up to fascist forces in Greece and lost his life doing so. “I am resigning to make him and his legacy proud,” he wrote.
The Questions
The yellow ribbon protest and the subsequent resignations raise profound questions about the relationship between science and politics in American public health:
When do career civil servants have an obligation to resign versus stay and resist from within? Daskalakis and his colleagues ultimately chose to leave rather than implement policies they believed were harmful. But their departures also removed experienced voices from the agency. Some public health experts worried that mass resignations of career scientists would leave agencies even more vulnerable to political interference.
What happens when scientific advisory processes are dismantled? The ACIP had operated for decades as a buffer between politics and vaccine policy, ensuring that immunization recommendations were based on evidence reviewed by independent experts. Kennedy’s decision to fire the entire panel and replace them with allies represented a fundamental change in how such decisions would be made. By late 2025, the reconstituted panel had voted to roll back the decades-old recommendation that all newborns receive hepatitis B vaccine at birth.
Can symbolic protest by scientists be effective when they can’t speak freely? The yellow ribbons were a limited form of resistance—visible to colleagues but not to the public. Only after Daskalakis resigned did he publicly explain their meaning. This raises questions about what forms of protest are available to civil servants bound by restrictions on political activity, and whether quiet symbols of solidarity matter when they remain largely invisible.
Who bears the cost when public health becomes a political battleground? Daskalakis warned that the changes to vaccine policy threatened to return the country to a “pre-vaccine era where only the strong will survive.” Public health experts worried about declining vaccination rates and the potential return of diseases that had been largely eliminated. But the human cost was also immediate—experienced scientists leaving public service, demoralization among career staff, and the erosion of institutional knowledge.
What is the legacy of scientific expertise in times of political upheaval? The yellow ribbon protest represented a moment when career scientists felt they had to mark their ethical position even at professional risk. It documents a crisis of institutional legitimacy—when the nation’s premier public health agency became, in the eyes of some of its own leaders, a vehicle for ideology rather than science.
The Legacy
After his resignation, Daskalakis returned to local public health work in New York City, taking a position as Chief Medical Officer at Callen-Lorde Community Health Center, which serves LGBTQ+ communities. He continued to wear the yellow ribbon pin as “an act of defiance and a vigil for the freedom of scientific voices.”
The pin serves as a reminder of the fragility of scientific independence within government institutions. It represents a moment when public health professionals felt they had to signal, however quietly, that something fundamental had gone wrong—that the expertise built over decades was being swept aside, that scientists were being silenced, that the mission of protecting public health was being subordinated to political ideology.
Its power lies in what it represented to those who wore it: a small gesture of resistance in a moment when speaking up more directly could cost someone their career. It’s a testament to the ways people find to protest even in constrained circumstances, and to the courage it takes to eventually walk away from work you love when staying would mean compromising your principles.
The yellow ribbon also raises an uncomfortable question for democratic societies: What happens when political leaders replace scientific expertise with ideology in institutions designed to protect public health? The answer, Daskalakis and his colleagues believed, was too dangerous to accept in silence—even if their protest had to begin as quietly as pinning a ribbon to their lapels.
Whether their warnings will prove prescient, and whether the departure of experienced scientists will ultimately weaken public health infrastructure, remains an open question. But the yellow ribbon endures as evidence of a moment when those inside the system felt compelled to signal that something had gone profoundly wrong—and when some chose to leave rather than be complicit in changes they believed would cause harm.
Special thanks to the USC Digital Imaging Lab for their support in digitizing this item.
