The mRNA Flu Shot Just Got Approved. The 48 Hours of Hell Nobody’s Talking About.
Moderna’s first FDA-approved mRNA flu shot is a breakthrough — faster updates, better protection, and a regulatory green light for a whole new class of vaccines. But the same immune potency that makes it work also causes severe side effects, including the ’48 hours of hell’ that many remember from COVID shots. The real story isn’t just medical progress; it’s a personal trade-off between short-term pain and long-term gain, and a competitive disruption that will reshape the vaccine industry.