Cov lus teb rau cov neeg siv khoom

Peb xa cov thoob khib nyiab 4-6 ntim / hli mus rau txawv teb chaws. Muab ntau yam khoom siv cia rau cov neeg siv txawv teb chaws. peb kuj tau txais cov lus pom zoo los ntawm peb cov neeg siv khoom txawv teb chaws.