3. HBV: Modes of transmission Parenteral -IV drug abusers, health workers are at increased risk Sexual-sex workers and homosexuals are particular at risk Perinatal( Vertical)-mother(HBeAg+)-intant▪ Parenteral - IV drug abusers, health workers are at increased risk. ▪ Sexual - sex workers and homosexuals are particular at risk. ▪ Perinatal(Vertical) - mother(HBeAg+) →infant. 3、HBV: Modes of Transmission