結果 : how long contagious after cold symptoms start
2:34

How Long Are Cold, Flu Symptoms Contagious?

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How long is a cold contagious? #Cold #viralinfection #coldvirus

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How do you know if you have bronchitis?

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How long are colds & flu's contagious? - CALPOL® IRE Expert Chats

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Cough after respiratory infection - how long is normal?

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Dermatologist explains causes of cold sores

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