The probability of human-to-human transmission of H5N1 is “incredibly low,” Chowdhury says. But if it have been to come about in a sustained manner, it could rock the globe in a way not seen Because the 1918 Spanish Flu. 5 to 7. For H5N1 among birds, it's about 100. It https://www.dailypioneer.com/2019/top-stories/former-additional-chief-secretary-d-babu-paul-dies.html