Bird Flu (H5N1) Explained: Finland Will Start Vaccinating Humans In A Global First

Here’s the latest news about a global outbreak of H5N1 bird flu that started in 2020, and recently spread among cattle in U.S. states and marine mammals across the world, which has health officials closely monitoring it and experts concerned the virus could mutate and eventually spread to humans, where it has proven rare but deadly.

Finland said it plans to begin vaccinating vulnerable populations like farm workers against bird flu as early as next week using 10,000 vaccine series—each with two doses—acquired as part of a European Union deal with vaccine...