WHO Warns Growing Spread of Bird Flu to Humans Is 'Enormous Concern' <img width="128" height="52" src="https://www.sciencealert.com/images/2024/04/chickens_farm_bird_flu.jpg" alt="chickens on a farm"/> "The mortality rate is extraordinarily high." https://www.sciencealert.com/who-warns-growing-spread-of-bird-flu-to-humans-is-enormous-concern