From: CCTV News
With the change of climate, northern China has entered the peak period of pollen in spring, and the high concentration of pollen will last for several months, which is expected to reach the middle of May. At present, there is no way to cure allergic rhinitis completely. When people with pollen allergy go out, try to wear pollen protective masks, masks, etc., away from places with many trees, and take preventive drugs in advance.
Source: @ CCTV News