Consecutive respiratory When the patient is coughing, sneezing, spitting phlegm or saliva. Come out and spread germs around. When a person close to the inhalation of germs and disease.
Contact respiratory. When patients cough, sneeze or phlegm to spit saliva. The germs are spread out and. When people inhale breathe remove germs to cause disease.
When the patient respiratory contact. By the yak spit saliva dry cough or allergy to come out, and scattered over when the person breathe out germs. There will be a plague.