HIV/AIDS

 Once somebody asked me why we can’t eradicate malaria by treating every person in malaria-endemic countries with an effective ant-malarial drug at the same time. As long as they all stay on the drug for as long as it takes for the current generation of infected mosquitoes to die (1-2 weeks on average, maybe a month maximum), then the human reservoir will be eliminated, no new mosquitoes will become infected, and that would be the end of malaria. It was an interesting idea, but who, exactly, was going to take on the task of putting every African on the same drug at the same time and making sure they stick with it long enough?