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(1/4) Study of #SARSCoV2 antibody prevalence in a school community following an outbreak in Chile (the first cluster in the country). 10% of students and 17% of staff tested positive. Of these, 40% of students and 18% of staff were asymptomatic. #COVID19
academic.oup.com/cid/article/do…
(2/4) The index case(s) were thought to be adults in this cluster. The school year had only just begun and the school closed within 2 days of the first cases being detected, demonstrating that #SARSCoV2 can spread rapidly within the school environment.
(3/3) I would not be surprised if some false positives were observed here, and I suspect the correct proportion of asymptomatic cases may actually be a little lower. Nonetheless, it suggests that asymptomatic infections in children are substantial.
(4/4) It is also possible that some cases may have been missed in this cluster - particularly in children - as people with mild illness are less likely to produce detectable antibodies. So expect a few false negatives, too.
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