There were no known cases in which health workers had become infected through blood.
A small number of people think they have been infected through sucking.
Children may also become infected through sexual abuse or rape.
A baby on the other hand can get infected through breast feeding.
Most of the women did not use drugs themselves; they were infected through sexual intercourse.
A swimmer can also be infected through a skin cut.
"But there is just no evidence so far of anyone being infected through cross-contamination."
A subject can get infected through contact with or consumption of the contaminated water.
Initially, health officials thought the woman became infected through a blood transfusion.