A nurse waits in an observation room to watch for adverse effects in people who have just received the Moderna coronavirus vaccine at the newly-opened mass vaccination center in Tokyo Monay, May 24, 2021.  Japan opened mass-vaccination sites in two of the country’s biggest metropolitan areas, Tokyo and Osaka, with the goal of administering the shots to up to 15,000 elderly people a day. (Carl Carl Court/Pool Photo via AP)