The UK prime minister's call to cut aid over gay rights is a play to a domestic audience.

By trying to do too much, the disease-fighting Global Fund has run into problems. It is spending public funds in a way that is perverting the market for malaria drugs and could do more harm than good.

The private sector can and should play an important role in public health, but it remains to be seen whether or not the benefits that have arisen from the AMFm could have been achieved through alternative mechanisms and potentially at lower cost.

This week's UN Environment Program meeting on insecticide use will surely be enlivened by the Southern African Development Community's recent decision to start producing DDT to combat malarial mosquitoes.

Setting up experiments and then ignoring the results when they do not give you what you want amounts to scientific malfeasance. All in a day’s work at the UN Environment Program.

DDT is still a critical weapon in the battle against malaria and other insect-borne diseases.

It is the world's most successful public health insecticide, saving millions upon millions of lives from insect-borne diseases. Yet DDT remains the world's most misunderstood chemical.

Requiring African countries to use international competitive bidding processes for certain drug purchases has caused more harm than good.