Method 1: Open the window on time to ventilate, go to the drugstore to buy a box of moxa sticks, and light them indoors after ventilation, which has the function of sterilization. Don't order in a place with too good circulation, it won't work.

Method 2: Banlangen replaces tea, or licorice, lotus plumule and medlar are brewed together, without sugar, and they are drunk every day.

In addition, there are Siraitia grosvenorii, Boat-fruited Sterculia, honeysuckle and mint, all of which can be drunk together.

Method 3: Drink chicken soup, chicken is the best, and steaming chicken soup is the best and safest cold medicine.

Method 4: Eat fermented bean curd and drink yogurt. Fermented food contains probiotics, which helps to resist bad bacteria.

Method 5: The most economical and convenient way. Take a few garlic whites and eat them raw. Allicin is a great bactericidal ingredient, which is much safer than antibiotics.