COVID-19：抗体の効果、急速に減退： Imperial College London（動画）：
COVID-19: Antibody effect, rapid decline: Imperial College London survey:
COVID-19：抗体的作用，快速下降：伦敦帝国理工学院的调查
コロナ免疫：
新型コロナウイルスに感染して抗体ができても、「免疫が急速に減退する可能性」がある。
英大学インペリアル・カレッジ・ロンドンの大規模調査で、明らかになった。
抗体の効果：
抗体の効果を数カ月で失う恐れがあるという。英メディアが10月27日伝えた。
Imperial College Londonの調査：
調査は、英イングランド地方の36万人以上の成人が対象。
- 6月下旬から7月上旬に全体の6％から抗体を検出した。
- しかし、9月には、抗体の検出が、4.4％に減少した。
デーリー・テレグラフ：
ワクチンが完成しても、免疫が十分に持続せず、「年に2度の接種が必要となる可能性がある」と説明した。
https://www.47news.jp/5426588.html
Coronavirus antibody prevalence falling in England, REACT study shows
Tests on more than 365,000 people in England
have shown that the antibody response to the virus that causes COVID-19 wanes over time.
Led by Imperial College London, analysis of finger-prick tests
carried out at home between 20 June and 28 September
found that the number of people testing positive dropped by 26.5% across the study period, from almost 6% to 4.4%.
Our study shows that over time there is a reduction in the proportion of people testing positive for antibodies.
It remains unclear what level of immunity antibodies provide, or for how long this immunity lasts.
Prof Paul Elliott study author, Imperial College London
The downward trend was observed in all areas of the country and age groups, but not in health workers, which could indicate repeated or higher initial exposure to the virus, the authors suggest.
The decline
was largest in people aged 75 and above compared to younger people, and also in people with suspected rather than confirmed infection, indicating that the antibody response varies by age and with the severity of illness.
Imperial News | Imperial College London
https://www.imperial.ac.uk/news/207333/coronavirus-antibody-prevalence-falling-england-react/