The probability of human-to-human transmission of H5N1 is “really minimal,” Chowdhury states. But if it were to occur in a sustained fashion, it could rock the world in a way not noticed since the 1918 Spanish Flu. one) These vaccines are usually not tested on genuine folks in real situations https://www.dailypioneer.com/state-editions/ranchi/five-day-jharkhand-fest-ends.html