It says they can, actually. Do you know why? Because George Washington himself struggled with the issue of mandatory inoculation during the Revolutionary War and realized the hard way that losing more troops to smallpox than to combat was something that only stopped when everybody was inoculated. And afterwards, at the Constitutional Convention, he made sure everybody knew that America wouldn't be there if he didn't have that authority, so it got written into the Constitution. Public health is mentioned several times. Why do you hate America?