At least half the United States would rather die than wear a mask - so these safety measures simply are not happening here. There's no political will.
Reminds me of the DARE program. Fill kids heads full of lies about how all drugs will ruin your life. Then they try pot and alcohol and realize your full of shit about those so you're probably lying about mdma, heroin and crack.
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.