Less than 30% of Japan's medical workers have been fully vaccinated against COVID-19 in major cities with just 65 days to go before the start of the Tokyo Olympics, the Nikkei newspaper reported Wednesday, amid growing calls for the games to be canceled.

Cabinet figures released this week showed that three months into the nation's COVID-19 vaccination push, less than 40% of all medical workers in the country were fully inoculated.

The problem is especially pronounced in Tokyo and other large population centers, where the rate of fully vaccinated medical workers was less than 30%, the Nikkei reported.