Nearly half of Jakarta residents had been infected with corona - antibody tests revealed

Recently CNN.co.jp reported the following:

ジャカルタ住民の半数近くがコロナ感染か　抗体検査で判明

2021.07.14 Wed posted at 12:42 JST

（ＣＮＮ） インドネシアの首都ジャカルタで３月に実施された新型コロナウイルスの抗体検査から、住民の半数近くが感染していたとの結果が報告された。これは公式発表されていた感染者数の１２倍以上に相当する。

ジャカルタの保健当局とインドネシア大学、エイクマン分子生物研究所と、インドネシアに駐在する米疾病対策センター（ＣＤＣ）のスタッフによる共同チームが報告書をまとめ、今月１０日に発表した。

それによると、３月１５～３１日にジャカルタ市内の約５０００人を対象に抗体検査を実施したところ、全体の４４．５％で新型コロナウイルスに感染したことを示す抗体が検出された。

政府統計によると、ジャカルタの人口は約１０６０万人。このうち約４７０万人が３月末までに感染していたことになる。

一方インドネシア保健省の集計によれば、３月末までに確認された感染者は３８万２０００人あまり。１３日の時点では感染者が６８万９２４３人に増えたと発表されている。

感染力の強いデルタ変異株の拡散とともに、同国では連日、何万人もの新規感染者と最大１０００人の死者が報告され、ジャカルタがあるジャワ島などで医療体制がひっ迫している。

インドネシア大学の疫学者、パンドゥ・リオノ博士によると、３月の検査では人口密集地の住民や太り過ぎの人、血糖値が高い人の感染リスクが高いことも分かった。抗体を持つ人が最も多い年代は３０～４９歳で、男性より女性の感染率が高かった。

人口の一定割合以上が免疫を持つと「集団免疫」が達成されるが、ジャカルタのように人の流れや出入りが多い都市で集団免疫を成立させるのは難しいと、研究チームは指摘する。新型コロナウイルスに感染することで得られる免疫の強さや持続期間も、今のところはっきり分かっていない。同チームはそれよりも、住民へのワクチン接種に重点を置くべきだと主張する。

ＣＮＮの集計によると、インドネシアで接種を完了した人は全人口の５．５％。保健省のデータによれば、ジャカルタ市内では人口の約１８％に相当する１９５万人あまりが接種を完了した。

同国では接種を開始した今年１月以降、中国シノバック製のワクチンを使ってきたが、接種後の医療従事者数百人が感染し、数十人が入院した。

国営アンタラ通信によると、ブディ保健相は９日、変異株への免疫を強化するためとして、医療従事者全員に米モデルナ製のワクチンを追加接種すると発表。先週末には米国から第１弾が出荷された。

Translation

(CNN) The antibody tests for the new coronavirus conducted in March in Jakarta, the capital of Indonesia, reported that nearly half of the inhabitants had once been infected. This was 12 times more than the officially announced number of infected people.

A joint team of health officials from Jakarta, the University of Indonesia, the Akeman Institute for Molecular Biology, and staff from the Centers for Disease Control and Prevention (CDC) in Indonesia had together compiled a report and released it on the 10th of this month.

According to the report, when antibody tests were conducted on about 5,000 people in Jakarta from March 15 to 31, antibodies indicating infection with the new coronavirus were detected in 44.5% of them.

According to government statistics, Jakarta had a population of about 10.6 million. Of these, about 4.7 million had been infected by the end of March.

On the other hand, according to the Indonesian Ministry of Health, about 382,000 infected people were confirmed by the end of March. As of the 13th, it was announced that the number of infected people had increased to 689,243.

With the spreading of the highly infectious Delta mutants, tens of thousands of new infection cases, and up to 1,000 deaths were reported daily in the country, and the medical system was tight in areas such as Java, where Jakarta was located.

According to Dr. Pandu Riono, an epidemiologist at the University of Indonesia, a test in March also found that people in densely populated areas, people overweight, and people with high blood sugar levels were at high risk of infection. The age group that had the highest number of people with antibodies was between the ages of 30 and 49, and the infection rate of women was higher than that of men.

While "Herd immunity" could be achieved when more than a certain percentage of the population had immunity, but the research team pointed out that it was difficult to establish herd immunity in a city like Jakarta where there was a lot of people moving in and out. The strength and duration of immunity gained from infection with the new coronavirus was also unclear at this time. The team argued that the focus should be on vaccination of the population.

According to CNN data, 5.5% of the total population had completed vaccination in Indonesia. According to data from the Ministry of Health, in Jakarta about 1.95 million people, or about 18% of the population, had completed vaccination.

Starting in January this year the country had been using a vaccine made by Sinovac of China for vaccination, but hundreds of medical workers after vaccination had been infected and dozens were hospitalized.

According to the state-run Antara news agency, Health Minister Budi announced on the 9th that all healthcare workers would be vaccinated with a US Moderna vaccine to strengthen immunity to the mutant strains. The first batch was shipped out from the United States last weekend.

              So, in Jakarta of Indonesia, with the spread of highly infectious Delta mutants, tens of thousands of new infections and up to 1,000 deaths are reported daily in the country. It is interesting to note that its Health Minister Budi announced that all the healthcare workers would be vaccinated with a US Moderna vaccine to strengthen immunity. This would cast doubt over the efficacy of the Chinese vaccines in fighting against the mutants.