The case fatality rate for H5N1 in the past has been around 50%: https://en.wikipedia.org/wiki/Human_mortality_from_H5N1 https://en.wikipedia.org/wiki/Human_mo

The case fatality rate for H5N1 in the past has been around 50%: https://en.wikipedia.org/wiki/Human_mortality_from_H5N1 https://en.wikipedia.org/wiki/Human_mortality_from_H5N1 If half the country starts dying people will either wear a mask and take other precautions or they will indeed die. It has to mutate to start spreading from person to person though, so that might affect how lethal it is.