is parainfluenza contagious
Transmission of Parainfluenza from Person to Person. Parainfluenza is considered to be contagious between people. Generally the infectious agent may be transmitted by saliva, air, cough, fecal-oral route, surfaces, blood, needles, blood transfusions, sexual contact, mother to fetus, etc.t is not caused by a defective or abnormal gene. The contagious disease, Parainfluenza, can be transmitted: 1  from person to person by saliva, air, coughing, contact, surfaces, fecal-oral route, etc.