Japan looks to start coronavirus antibody tests this month

Linda J. Dodson

TOKYO — Japan will begin conducting antibody tests for undetected cases of coronavirus infection as early as this month, the country’s health minister announced Friday, saying he hoped the move would help combat the outbreak more effectively.

The Ministry of Health, Labor and Welfare has yet to determine where or to what extent the tests will be administered.

Antibody tests can identify who has been infected by the new coronavirus and recovered — a key question, since an estimated 80% of cases produce only mild symptoms.

Using them together with PCR tests, which detect the presence of the virus itself, Japan will seek “better operational performance and more efficient diagnosing,” Health Minister Katsunobu Kato told reporters.

Some hope that determining what proportion of Japan’s population has had a brush with the coronavirus and survived can accelerate the restart of economic activity. Health experts in Japan have called for antibody testing as part of the country’s response to the pandemic.

In the U.S., the National Institutes of Health is conducting coronavirus antibody tests on blood samples from up to 10,000 people in an effort to determine the extent of the outbreak. Antibody tests are also seeing widespread use in Europe.

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