A growing number of researchers question the "official" inflated numbers of HIV/AIDS prevalence in African countries such as Botswana, South Africa and Lesotho. Poor testing, a special diagnosis of AIDS in Africa and erroneous computer-generated estimates by the UN had led to "misleading" numbers, they hold. Ten years ago, Uganda was internationally recognised as the country worst struck by the disease, with local prevalence rates reaching 30 percent. During the last decade, the assumed high AIDS prevalence of the early 1990s should have led to increased mortality in Uganda. This is not the case. The country's mortality rate has in fact declined, especially due to lower infant and childhood mortality rates. Uganda's population now grows at an average annual rate of 3.4 percent - the highest ever. "Botswana has just concluded a census that shows population growing at about 2.7 percent a year, in spite of what is usually described as the worst AIDS problem on the planet." Meanwhile, he holds, a far greater number of Africans are dying from diseases that are cured at a much lower cost, such as malaria and tuberculosis (TB) and research on these diseases is suffering. "Two million get TB, but last time I checked, spending on AIDS research exceeded spending on TB by a crushing factor of 90 to one," he notes. He now urges to "start questioning some of the claims made by the AIDS lobby."