新型コロナ、子どもは伝染力弱い? 仏9歳児の事例で示唆
この児童は、同国での流行初期にオートサボア県で発生したクラスター(感染者の集団)で新型ウイルスに感染した。このクラスターでは、シンガポールから戻った後、スキー旅行で同県を訪れた英国人男性から12人にウイルスが伝染した。
米医学誌「臨床感染症学」に今月発表された論文によると、児童は感染しているとは知らずに3つの学校に通学。症状は軽度だったが、発症中に172人と接触したことが確認された。
接触者は全員隔離されたものの、児童のきょうだい2人も含め、新型ウイルスに感染した人はいなかった。一方、接触者の64%はインフルエンザなどの季節性ウイルスで陽性の結果が出た。
研究チームは、今回の事例は「子どもがこの新型ウイルスの重要な感染源ではない可能性を示唆している」と述べている。【翻訳編集AFPBBNews】
〔AFP=時事〕(2020/04/21-13:33)
French case raises questions over coronavirus child spread
A nine-year-old who contracted COVID-19 in eastern France did not pass the virus on to any other pupils at three ski-schools, according to new research that suggests infants are not large spreaders of the disease.
The child was infected in France's Haute-Savoie region in one of the first coronavirus clusters in the country, which saw 12 people catch the disease after a British man returned from Singapore and went on a ski holiday.
A study published this month in the US journal Clinical Infectious Diseases looked at the case of the child, who continued to attend three ski clubs while unknowingly infected.
Through rapid intervention by health authorities, it was ascertained that the child, who only displayed mild symptoms, came into contact with 172 people while sick.
All of those were placed in quarantine as a precaution, but none of them contracted COVID-19, not even the child's two siblings.
By contrast, 64 percent of those contacts tested positive for other seasonal illnesses such as flu.
Authors of the study said that the case of the child could suggest that children might not be an important source of transmissions of this novel virus.
One child, co-infected with other respiratory viruses, attended three schools while symptomatic, but did not transmit the virus, suggesting potential different transmission dynamics in children, Kostas Danis, an epidemiologist at Public Health France, and lead study author, told AFP.
While coronavirus infections in children appear to be mainly mild, it is thought that they may be capable of spreading the disease to older people at greater risk of serious illness.
Dozens of countries have closed schools as they try to contain the COVID-19 pandemic.
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