whatever affects us affects them, and vice-versa. reporter: so the team, with the approval of u.s. customs and border protection, devised a way to bring people to a secure spot along the port of entry. there are a few reasons they bus people to the point of entry to distribute the vaccines. one is they don t want to export vaccines that were paid for by u.s. tax dollars. but these doses were just days away from expiring. they were donated by doctors on the u.s. side who said there are no takers there and there are plenty of takers here, especially parents with children under 5 who are not yet eligible for the vaccine here. sophia is here with their two grandchildren. they re going for their second shot. once parked, dr. trevino joins other doctors and nurses on the bus, where the shots, and crying, begin. followed by gratitude from adults who got the shot too like josefina. you have hypertension and