People wager on potential Democratic presidential candidates on the predictions market site Polymarket on Feb. 25, 2026. Scott Olson/Getty Images

Prediction markets are opening many new opportunities for unregulated insider trading and unethical bets – in the name of making a game out of politics

The rapidly growing popularity of prediction markets is sparking worries about the markets’ effects on US politics, where campaign staff has bet on its candidate’s electoral performance.
Government approval of COVID-19 vaccines determines their availability to populations vulnerable to infection, such as children. Spencer Platt/Getty Images

Vaccine death and side effects database relies on unverified reports – and Trump officials and right‑wing media are applying it out of context

Anti-vaccine activists are using the side effect reporting system to spread fear and misinformation about the COVID-19 vaccines. But the database could also be used as a gauge for public concerns.
Donald Trump’s nominee for secretary of the Department of Health and Human Services, Robert Kennedy Jr., on Capitol Hill on Jan. 9, 2025. Jon Cherry/Getty Images

Robert F. Kennedy Jr.’s nomination signals a new era of anti‑intellectualism in American politics

Attacks on scientific expertise have been increasing, especially in politics. Health and Human Services nominee Robert F. Kennedy Jr. is among the more prominent people who have done that.
While the vast majority of primary care providers have higher confidence in vaccines than the general public, some do not. Evgeniy Shkolenko/iStock via Getty Images Plus

The 1 in 10 U.S. doctors with reservations about vaccines could be undermining the fight against COVID‑19

Many COVID-19 vaccination campaigns encourage doctors to serve as a trusted source of vaccine information. But certain vaccine-hesitant providers may stymie these efforts.
Studying trends in public adverse event reporting could help researchers address vaccine hesitancy and misinformation. Pict Rider/iStock via Getty Images Plus

Unverified reports of vaccine side effects in VAERS aren’t the smoking guns portrayed by right‑wing media outlets – they can offer insight into vaccine hesitancy

Anti-vaccine activists are using the side effect reporting system to spread fear and misinformation about the COVID-19 vaccines. But the database could also be used as a gauge for public concerns.
Maria Saravia, a worker at the University of Southern California’s Keck Hospital, adjusts her mother’s mask before her COVID-19 vaccination. Genaro Molina/Los Angeles Times via Getty Images

Why the next major hurdle to ending the pandemic will be about persuading people to get vaccinated

Getting a vaccine is proving difficult for many older people now, but the mad rush for the vaccine won’t last long. Many people don’t want to get one at all, and that will impede herd immunity.
If too many Americans refuse to take the COVID-19 vaccine, achieving population immunity will be difficult. Paul Hennessy/NurPhoto via Getty Images

Americans have unrealistic expectations for a COVID‑19 vaccine

Two in five Americans say they don’t want a COVID-19 vaccine, which is a problem. Finding out what Americans do want from a vaccine might help.
Il existe une longue histoire de liens entre les mouvements nationalistes blancs et l'armée américaine. Bo Zaunders/Corbis Documentary via Getty Images

L’armée américaine : vivier du suprémacisme blanc ?

Si la plupart des Américains sous-estiment la place qu’occupe le suprémacisme blanc dans l’armée, ils s’en inquiètent quand on leur en apporte la preuve.
There is a long history of links between white nationalist movements and the U.S. military. Bo Zaunders/Corbis Documentary via Getty Images

Americans aren’t worried about white nationalism in the military – because they don’t know it’s there

People typically underestimate how much white nationalism goes on in the military, but when they learn the truth, they’re concerned.
Naval Station Norfolk in Virginia, the Navy’s largest base, is endangered by sea level rise. Mass Communication Specialist 2nd Class Ernest R. Scott

Veterans are concerned about climate change, and that matters

Military veterans have concerns about climate change at about the same level as nonveterans, a recent study suggests. What might this mean for acceptance of climate science?
Californians in June 2015 protest a bill that did away with personal belief exemptions for vaccinating children before they enter school. Rich Pedroncelli/AP Photo

Desinformación y la vacuna contra la gripe: 3 lecciones para combatir mitos

El 43% de los norteamericanos cree, erróneamente, que vacunarse contra la gripe provoca que uno contraiga esta enfermedad, a pesar de que diversos estudios científicos han demostrado lo contrario.
Californians in June 2015 protest a bill that did away with personal belief exemptions for vaccinating children before they enter school. Rich Pedroncelli/AP Photo

Countering misinformation about flu vaccine is harder than it seems

Vaccination rates for children in some parts of California are down, despite a law that narrowed exemptions. Here’s a look at why people refuse to listen to evidence when it comes to the flu vaccine.
Vaccinations have saved countless lives and untold suffering, even though many adults still believe vaccines are bad for their children. Africa Studios/Shutterstock.com

Why vaccine opponents think they know more than medical experts

Vaccines have long been considered safe, but many people still believe they are not. A new study shows that people who think they know more than medical experts are more likely to believe that vaccine are not safe.

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