FDA Greenlights Three Landmark Therapies in a Single Day: Cancer, Melanoma, and Flu

The FDA handed out three major drug approvals in under 24 hours on Wednesday — a regulatory blitz spanning blood cancer, skin cancer, and infectious disease. The approvals signal a new class of myeloma drug, a novel oncolytic cancer therapy, and the first-ever mRNA flu vaccine entering the market.

Side effects: All three approvals carry important caveats — one requires a confirmatory trial, one carries a boxed safety warning, and one enters a market plagued by...