Or at lease one disease - Malaria.
Human trials have already proven successful by injecting some Mosquitos with a bacteria to disable the harmful chemicals the Mosquito would normally inject into a human then sends a bunch of these mutant Mosquitos into an active population of Mosquitoes where the offspring will carry the disability feature allowing us humans to eventually have no or few harmful Mosquitos in our human population as all Mosquitos would have this disibility feature when the older/current generations die out.
I could have explained it in a complicated scientific way but I don't think any computer geeks would understand the dna science behind it so that above is english only. Not that I would want to use Python or Monty Python to explain it.
Anyways back on subject. How do you feel that in about 10 years bill gates will be able to say he cured disease due to the research he started in 2002?