11.   He added that outside of Yunnan, sexual relations was the main mode of transmission.

12.   Heterosexual activity has become the main mode of transmission as promiscuous men infect their wives and girlfriends, experts say.

13.   However, the main mode of transmission of this virus is considered at this stage to be from bird-to-man.

14.   It could be related to violence between groups vying for lucrative routes for minibus taxis, the main mode of transportation for blacks.

15.   Officials said Saturday that the main mode of transmission seems to be from birds to humans, but that they cannot rule out human-to-human transmission.

16.   Taxi vans are the main mode of transportation for millions of poor blacks who live in rural areas and crowded townships near cities.

17.   The main mode of transport for the people in the riverine towns like Sibu, Sarikei and Kapit are boats.

18.   The main mode of travel has been trucks and buses.

19.   The main modes of HIV transmission are hetrosexual contact and injecting drug use.

20.   The main mode of transmission is heterosexual, he said.