HHS-OASH-2026-0397-3435
https://www.regulations.gov/comment/HHS-OASH-2026-0397-3435

• U.S. National Toxicology Program (NTP): A $30 million large-scale rodent study reported "clear evidence" of malignant schwannomas in the hearts of male rats exposed to high levels of 2G/3G radiofrequency radiation (RFR), alongside some evidence of brain gliomas and DNA damage in certain tissues.
• Ramazzini Institute: A large rodent study mirrored findings from the NTP, observing similar heart and brain tumor increases at lower exposure levels that closely mimic environmental cell tower exposures.
• Cellular and DNA Research: Multiple in vitro and animal studies (including reviews indexed via PubMed) suggest that RF radiation can increase oxidative stress, trigger cellular inflammation, or cause single- and double-strand DNA breaks under specific experimental conditions.
Here are two studies, one from the National Cancer Institute and the other from the National Institute for Health.

https://pmc.ncbi.nlm.nih.gov/articles/PMC6701402/

https://www.cancer.gov/about-cancer/causes-prevention/risk/radiation/cell-phones-fact-sheet