Half of Japan’s population has now received at least one dose of a COVID-19 vaccine, the government has said, marking a milestone as the country grapples with its largest wave of infections yet.
The nationwide tally of new cases on Wednesday topped 23,000 in another record high.
Just under 64 million of the nation’s population of 125 million had been partially or fully vaccinated as of Tuesday, according to data released by the Prime Minister’s Office, after the inoculation program was launched in February initially for health care workers and expanded to older people in April and later to other members of the public.
Roughly 49 million people, or nearly 40%, have received two doses.
But the inoculation rate differs greatly by age groups. While over 88% of people age 65 or older have received at least one dose and about 85% have had two doses, only about 24% of people younger than 65 have received one dose and 12% two doses.
According to the Ministry of Health, Labor and Welfare, the number of people who received two vaccine shots and still contracted COVID-19 was less than a 15th of the number of unvaccinated people who contracted the virus among cases reported between Aug. 10 and 12.
Among the 57,000 new infections in that period, 82% were unvaccinated, while those who received two doses accounted for only 3%, the ministry said.
Nearly half of the population is expected to have received two shots by the end of August, and close to 60% by the end of September, bringing Japan nearly on a par with the United States and Britain, Prime Minister Yoshihide Suga told a news conference on Tuesday.
Japan has so far exclusively used COVID-19 vaccines developed by Pfizer Inc. or Moderna Inc. It has begun only this week shipments of the AstraZeneca PLC shot for use in people age 40 or older to prefectures most in need of additional doses, such as Tokyo and Osaka.
The government is considering administering a third dose next year amid concerns over the vaccine’s efficacy waning over time and the spread of highly contagious variants of the coronavirus.
Some countries, including Israel, have already begun giving booster shots, while the World Health Organization has called on wealthy nations to wait for developing countries to secure more doses.
Experts advising the ministry over coronavirus measures said steps need to be taken to deal with the current “disaster-level” situation nationwide.
Japan’s progress in vaccinating its population comes as the government scrambles to contain a nationwide surge in COVID-19, on Tuesday deciding to expand its state of emergency to more prefectures and extend it to Sept. 12, after the Tokyo Paralympics end.
The capital reported 5,534 new cases on Thursday, the second most in a single day, with 274 people in severe condition. Osaka saw 2,443 new cases, marking a record high for the third straight day.
Shigeru Omi, the nation’s top COVID-19 adviser, said at a parliamentary hearing that he believes actual infection numbers are higher than reported due to insufficient testing, warning that the delta variant and people becoming less cooperative with government-mandated restrictions has caused the surge in cases.
Also Wednesday, Suga asked Japan’s largest business lobby to allow employees to work from home a day after calling on firms to reduce the number of commuters by 70%.
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