After reports that doses of COVID-19 vaccines were going unused, states are expanding vaccinations to other groups. But mass vaccination sites are leaving many frustrated while waiting in long lines. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': https://bit.ly/3i5b5gL WATCH OTHER FULL EPISODES OF WORLD NEWS TONIGHT: http://abc.go.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: https://bit.ly/3iQLwPp #WorldNewsTonight #COVID19 #MassVaccinationSites