21.   In Africa, AIDS is mainly spread by heterosexual contact or contaminated blood.

22.   In Africa, AIDS is spread mainly by heterosexual contact and contaminated blood products.

23.   In Africa, AIDS is spread primarily through heterosexual contact and people are urged to limit their sex partners and use condoms.

24.   In Africa, the AIDS virus is spread mainly by heterosexual contact in traditionally polygamous societies.

25.   In Africa, Acquired Immune Deficiency Syndrome is spread mainly by heterosexual contact in polygamous societies, by transfusions of contaminated blood and from mother to unborn child.

26.   In Africa, AIDS is spread mostly by heterosexual contact and contaminated blood and instruments.

27.   In Africa, it is mainly spread by heterosexual contact or contaminated blood.

28.   In Africa, AIDS is mostly transmitted through heterosexual contact.

29.   In Africa, AIDS is spread mainly by heterosexual contact in polygamous communities and by contaminated blood.

30.   In Africa, AIDS is spread mainly by heterosexual contact, contaminated blood and from infected mother to fetus in the womb.