Transmission of Rotavirus from Person to Person. Rotavirus 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.Rotavirus, although infectious, is not a genetic disease.It is not caused by a defective or abnormal gene. The contagious disease, Rotavirus, can be transmitted: 1  from person to person by saliva, air, coughing, contact, surfaces, fecal-oral route, etc.ontagion and contagiousness refers to how easily the spread of Rotavirus is possible from one person to another. Other words for contagion include infection, infectiousness, transmission or transmissability. Contagiousness has nothing to do with genetics or inheriting diseases from parents.