why can't the people who's going to be around the baby a lot get a whopping chough shot you just…

why can't the people who's going to be around the baby a lot get a whopping chough shot you just gotta get it once it's not like am asking them to give up a arm or anything just one shot i feel like saying well if you don't get it i guess u can't see him he's being bron right smack in the winter when all the stuff going aroud they say they won't catch anything but they don't know when they will get sick