Some 75% of people aged 65 and over in Japan have received at least one dose of a COVID-19 vaccine, with most set to be fully vaccinated by the end of July, a government survey showed Saturday.

The drive, launched in April to vaccinate the elderly population of around 35.48 million, has gained momentum under Prime Minister Yoshihide Suga's target to finish inoculating the demographic by the end of July.

Challenges remain, however, in expanding vaccinations to those under 65 as the government struggles to distribute doses quickly enough.