Going to the ballpark? How about attending a NBA playoffs game at an indoor arena? How safe is it now that you’re vaccinated? We connect with one of Yale’s top medical professors to see how safe it is to return to sporting events once you’re vaccinated and when you need, and no longer need, to wear a mask. » Subscribe to USA TODAY Sports: https://bit.ly/2L0ktE1 » USA TODAY delivers current local and national news, sports, entertainment,  finance, technology, and more through award-winning journalism, photos, videos and VR. #COVID-19 #vaccinations #sports