The chance of human-to-human transmission of H5N1 is “pretty very low,” Chowdhury says. However, if it were to manifest in the sustained fashion, it could rock the world in a way not viewed since the 1918 Spanish Flu. 1) These vaccines aren't analyzed on real persons in true scenarios nevertheless. https://www.dailypioneer.com/2015/state-editions/farmers-rural-job-workers-to-get-pm-insurance-cover.html