In Tokyo, Olympic organizers are facing growing pressure to ensure a safe Summer Olympics. Public concern has spiked, as COVID-19 cases rise in the Japanese capital, which is under a fourth state of emergency. In a local newspaper survey, two-thirds of the respondents say they do not believe Japan can host a safe, secure Olympics. Tens of thousands of athletes, officials and journalists have been arriving in the Japanese capital for the event. What are the measures they must follow?