title: Unprecedented emergency in Southern Africa.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome; D000349:Africa; D017954:Africa South of the Sahara; D000353:Africa, Southern; D001695:Biology; D003906:Developing Countries; D004194:Disease; D004467:Economics; D005069:Evaluation Studies as Topic; D015658:HIV Infections; D012307:Risk Factors; D014777:Virus Diseases