This morning, I felt a little uncomfortable in my throat

cucumber

This morning, I felt a little uncomfortable in my throat, had a little cough, a little dry, I thought is it covid? I was slightly frightened.
Later, I found out that it was because it is now winter already, and the relative humidity was only below 40. The throat that was a little uncomfortable was normal.
At night, I'm used to it, and there's nothing wrong with it.
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