Last Updated：2025/11/22
Sentence
ウイルスの感染性は、症状が現れる直前に最も高まり、封じ込めを困難にした。
Quizzes for review
The infectiousness of the virus peaked just before symptoms appeared, making containment difficult.
See correct answer
The infectiousness of the virus peaked just before symptoms appeared, making containment difficult.
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