Senator Ron Johnson (R-WI) made controversial claims during a June 2026 Senate hearing, alleging that federal health agencies, along with Pfizer and Moderna, failed to fully review COVID-19 vaccine injury data before authorizing booster shots. The hearing, titled 'Plausible Mechanisms of COVID-19 Injections Causing Cancer and Attacks on Scientific Publications and Research,' focused on disputed scientific concerns, regulatory oversight, and vaccine safety transparency. Show more Show less