We're in the middle of autumn. It's getting much cooler than summer, but it's cold at times especially at night. In this season, many people tend to catch the cold more easily because of unexpected weather change. So, how to prevent it? You can obtain a lot of useful information in the today's lesson!
First, let's watch this video.
The common cold.
English subtile:
The common cold is a group of symptoms in the upper respiratory tract caused by almost 200 viruses.
The most common perpetrator is the rhinovirus, which causes around 40% of colds. The cold enters your body through your nose or mouth and is easily spread when touching someone or common objects.
You are more likely to catch a cold if you are excessively fatigued, have emotional distress or have allergies with nose and throat symptoms. ......(updating)
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