"Urgent Concern: Bird Flu Threatens Humans and Livestock, WHO Warns"
The World Health Organization has expressed significant concern over the spread of H5N1 bird flu, particularly due to its high mortality rate in humans. The virus has recently been found in several mammal species, including domestic cattle in the US, raising the risk of transmission to humans. While there is currently no evidence of human-to-human transmission, the WHO is emphasizing the need for increased monitoring and preparedness, including the development of vaccines and therapeutics, to ensure a swift response in the event of such transmission.