hey’ve thought of each other as enemies. They’re on opposite sides of a culture war. They believe drastically different things about vaccines.

But, earlier this year, they did the rarest of things: They had a civil discussion and found common ground.

Since April, leading public health experts from institutions like Yale and Brown have been meeting with grassroots members of Health Secretary Robert F. Kennedy Jr.’s Make America Healthy Again movement, or MAHA, to build trust and bridge deep divides over health care.

The conversations are the brainchild of Brinda Adhikari, a journalist and former television producer who grew increasingly concerned about Americans’ mistrust of institutions after Donald Trump’s reelection.

“These are two groups that talk a lot about each other,” said Adhikari, who has worked for ABC News and executive produced the podcast and television show, “The Problem with Jon Stewart.” “I just don’t see a lot of spaces where they talk to each other or with each other.”

The conversations are captured on Adhikari’s weekly podcast, “Why Should I Trust You?”

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This episode was made possible by the support of Yakult and produced independently by Scientific American's board of editors.

Rachel Feltman: Happy Monday, listeners! For Scientific American’s Science Quickly, I’m Rachel Feltman. You’re listening to the weekly science news roundup. Let’s dive right in.

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As top US health officials turn against some mRNA vaccines, experts fear for the country’s preparedness for the next pandemic and worry that other vaccines will be targeted next.

Donald Trump’s administration recently canceled a $766m award to Moderna on the research and development of H5N1 bird flu vaccines, and officials have announced new restrictions and regulations for Covid mRNA vaccines – actions that signal a move away from the breakthrough technology.

These changes add to other vaccine-related shakeups at health agencies, including layoffs and resignations of top vaccine officials and the abrupt termination of HIV vaccine research.

On Monday, Robert F Kennedy Jr, secretary of health and human services, announced he was disbanding the independent advisory committee on vaccines for the US Centers for Disease Control and Prevention (CDC).

On Monday, Health and Human Services Secretary Robert F. Kennedy, Jr. wrote in the Wall Street Journal that “Vaccines have become a divisive issue in American politics,” and “The U.S. faces a crisis of public trust.”

“Whether toward health agencies, pharmaceutical companies or vaccines themselves, public confidence is waning,” Kennedy warned.

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U.S. Secretary of Health and Human Services Robert F. Kennedy, Jr., abruptly removes all 17 sitting members of the CDC’s Advisory Committee on Immunization Practices (ACIP). An epidemiologist explains how this will affect people’s health and vaccine access.

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(TNND) — Health officials are sounding alarms over Robert F. Kennedy Jr.'s decision to overhaul a vaccine advisory board with his appointees.

The Health and Human Services secretary announced Monday in a Wall Street Journal opinion article that he was replacing all 17 members of the Advisory Committee on Immunization Practices.

The ACIP is an expert scientific panel that develops vaccine recommendations for the Centers for Disease Control and Prevention.

The immunization schedule, or list of recommended shots, for kids is based on the panel’s advice to the CDC.

The ACIP recommendations have consequences for which vaccines insurers are willing to cover and which vaccines doctors recommend to their patients.

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For the first time since the COVID vaccines became available in pharmacies in 2021, the average person in the U.S. can’t count on getting a free annual shot against a disease that has been the main or a contributing cause of death for more than 1.2 million people around the country, including nearly 12,000 to date this year.

“COVID’s not done with us,” says Jennifer Nuzzo, an epidemiologist at Brown University. “We have to keep using the tools that we have. It’s not like we get to forget about COVID.”

In recent weeks, the Department of Health and Human Services, led by prominent antivaccine activist Robert F. Kennedy, Jr., has announced a barrage of measures that are likely to reduce COVID vaccine access, leading to a swirl of confusion about what will be available for the 2025–2026 season. HHS officials did not respond to a request for comment for this article.

In December 2024, a group of scientists did something rare: published a warning against building a technology that some of them had spent years working toward. Even more eye-popping, this came at least a decade before the tech is even possible.

The warning concerned mirror bacteria: hypothetical synthetic organisms built from mirror-image forms of the proteins, amino acids, DNA, and other biomolecules used by life on earth.

In an analysis published in Science, we and 36 colleagues—including two Nobel Laureates and 16 members of national academies from around the world—argued that such organisms could be built within the next 10 to 30 years and could pose an extraordinary threat if they were.
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The Centers for Disease Control and Prevention’s plans to consolidate data on diseases like measles and polio are raising concerns about patient privacy, delays in spotting long-term trends and ways the Trump administration may use the information.

The agency told state officials earlier this week that it would shift disease information to a new system managed by Palantir, the data analysis and technology firm co-founded by Peter Thiel.

The Trump administration’s cancellation of $766 million in contracts to develop mRNA vaccines against potential pandemic flu viruses is the latest blow to national defense, former health security officials said. They warned that the U.S. could be at the mercy of other countries in the next pandemic.

“The administration’s actions are gutting our deterrence from biological threats,” said Beth Cameron, a senior adviser to the Brown University Pandemic Center and a former director at the White House National Security Council. “Canceling this investment is a signal that we are changing our posture on pandemic preparedness,” she added, “and that is not good for the American people.”

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Prior to becoming Health and Human Services Secretary, Robert F. Kennedy Jr. had espoused the idea of "medical freedom," the ability of people to make personal health decisions for themselves and their families without corporate or government coercion.

It's an idea supported under Kennedy's Make America Healthy Again (MAHA) movement to reduce the prevalence of chronic disease in the U.S. by making healthier lifestyle choices.

On topics, such as vaccines, Kennedy has said he wouldn't prevent children from being able to receive vaccines but would leave the choice up to parents.

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