There is more good news in the area of public health. A couple of days ago I posted on the decline of human mortality rates in the tropics. Now the UN agency for HIV/AIDS, UNAIDS, reports that HIV infection rates, especially of the mother-to-child variety, are on a downward trend.

The New York Times reports:

New infections with H.I.V. have dropped by half in the past decade in 25 poor and middle-income countries, many of them in Africa, the continent hardest hit by AIDS, the United Nations said Tuesday.

The greatest success has been in preventing mothers from infecting their babies, but focusing testing and treatment on high-risk groups like gay men, prostitutes and drug addicts has also paid dividends, said Michel Sidibé, the executive director of the agency U.N.AIDS.

Adding that:

Some regions, like Southern Africa and the Caribbean, are doing particularly well, while others, like Eastern Europe, Central Asia and the Middle East, are not. Globally, new infections are down 22 percent from 2001, when there were 3.2 million. Among newborns, they fell 40 percent, to 330,000 from 550,000.