The United States has reported its first H5N9 bird flu outbreak in California, affecting almost 119,000 ducks. Both H5N9 and the more common H5N1 strains were found. The USDA is conducting investigations and enhanced surveillance, highlighting H5N1’s higher human risk compared to H5N9, which is rarer and less transmissible to humans. The United States has reported its first H5N9 bird flu outbreak in California, affecting almost 119,000 ducks. Both H5N9 and the more common H5N1 strains were found. The USDA is conducting investigations and enhanced surveillance, highlighting H5N1’s higher human risk compared to H5N9, which is rarer and less transmissible to humans. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle