FDA expands warning about rare heart side effect in two leading Covid vaccines

The Food and Drug Administration has mandated that https://www.livemint.com/market/market-stats/stocks-pfizer-share-price-nse-bse-S0003170">Pfizer and https://www.livemint.com/news/us-news/covid19-us-fda-approves-new-lower-dose-moderna-made-vaccine-check-details-11748712301237.html">Moderna expand warning labels on their mRNA COVID-19 vaccines (Comirnaty and Spikevax) to highlight a rare risk of myocarditis and pericarditis, which are heart inflammation conditions, primarily in males aged 16–25. The updated labels now cite an incidence rate of 38 cases per million doses in this demographic, up from prior warnings focused on ages 12–17 (Pfizer) and 18–24 (Moderna).