first opinion
Tom Frieden breaks down RFK Jr’s anti-vax tactics

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Last week, HHS Secretary Robert F. Kennedy Jr. announced that the U.S. will no longer contribute money to Gavi, a global alliance that helps provide vaccines to the world’s poorest children. In the message posted to X, Kennedy accused its members of “not taking vaccine safety seriously.” Former CDC director Tom Frieden takes issue with this claim, calling it “wrong and dangerous” in a new First Opinion essay.
In the same message, Kennedy also referenced a study that’s long been cited to claim that DPT vaccines are harmful to children. But Frieden says that study’s findings are “bullshit,” and breaks down the math on why. On top of that, “let’s apply common sense,” he writes. “This finding is clearly absurd, which is why no rigorous study has ever found anything like this.”
Read more from Frieden on how Kennedy’s tactics are straight from the anti-vaccine playbook.
health disparities
The link between segregation and lung cancer
While it’s long been understood by experts that socioeconomic factors significantly contribute to racial disparities in lung cancer rates, the impact of residential segregation in particular has been underexplored. But a study published yesterday in JAMA Network Open suggests a strong connection between where a Black person lives and their risk of lung cancer. In a cohort of more than 71,000 people living in Southern states between 2002 and 2019, lower residential segregation was significantly associated with decreased lung cancer risk for Black people — but not for their white peers.
There were some mediating factors — menthol smoking and exposure to fine particulate matter in the atmosphere influenced almost half of the association between segregation and cancer, according to the paper. But as the authors noted, that still leaves more than half of the variation in lung cancer risk for Black participants unexplained. While much more work needs to be done to reduce segregation, the authors note that there should also be public health efforts to address these mediating factors.