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RSV is a single-stranded RNA virus that usually begins to spread in late autumn, with winter as the main infectious period, which can cause respiratory infections of all ages. The incubation period after infection is extremely short, only 2 to 8 days. The most frightening part of this virus is that its disease progressed quite rapidly. It may only take 2 to 3 days to develop from mild cold symptoms or fever to severe respiratory distress syndrome, pneumonia, or bronchitis. At present, no drug could treat the RSV virus directly, and no vaccine can prevent RSV for a long time. Therefore, many pharmaceutical companies are researching vaccines that can prevent RSV.