witnessed before. they re getting four injections and that usually takes prep time and 15 minutes. reporter: kathy rosati has been vaccinated and now is a breakthrough case. it s bad, i don t want to end up there. i am going to take all the measures i can. joining us now, chief medical adviser to the president, dr. anthony fauci. dr. fauci, thank you so much for being with us. we are in an area, a county that s not using boosters the way they should. i got boosters and they re going to go bad. we actually went into get them. had a little kick to it.