FDA adds new warning for "myocarditis" to the Pfizer and Moderna COVID-19 vaccines (prev mainly assoc w/ Moderna) - risk is 8 per 1 million people for those on 2023-2024 COVID shots, most common in males ages 12 to 24. Generally good outcomes seen. https://t.co/QZbTRaKGH1 https://t.co/1cAUw73eqF