In addition to welcoming foreign visitors coming from previously-banned countries and imposing a new vaccination requirement on non-residents entering the U.S. by air (with exceptions) there are new rules for unvaccinated Americans returning to the U.S.
They aren’t based on science of protecting public health, they’re meant to make life difficult for the unvaccinated. Depending on your view you may favor this! I’m 100% pro-vaccine. But don’t pretend it’s something else.