In the fall, as the seasons change and the weather turns cooler, which is more noticeable in the morning and evening, more children become sick with coughs and fevers. After the onslaught of the New Crown Epidemic, most people have become more resistant to the New Crown virus, but have been defeated by the influenza virus again. The flu season in Taiwan starts around winter and lasts until spring. The flu vaccine varies greatly from year to year, and it takes two weeks for the flu vaccine to become protective, so in order to get the flu vaccine early, it's important to get the flu vaccine early.