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JC virus infection 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.
JC virus infection, although infectious, is not a genetic disease. It is not caused by a defective or abnormal gene.
The contagious disease, JC virus infection, can be transmitted:
Contagion and contagiousness refers to how easily
the spread of JC virus infection 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.
For an overview of contagion,
see Introduction to Contagion.
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