The Olympic Games now look certain to go ahead in Japan in July. However, some people in the country are against holding the event, as it tackles a fourth wave of coronavirus cases, low vaccination and the extension of a state of emergency in Tokyo and other areas. Two doctors in Tokyo share their observations, experiences and concerns.

As some countries, including Japan, struggle to vaccinate older members of their populations, host Nuala McGovern also hears from two 12-year-olds in Canada and the United States. They were among the first children in the world to receive a Covid vaccine.