Malaria causes loss of about 40 million disability-adjusted life-years per year. Over a decade, that would total 400 million life-years. Somehow making all mosquitoes resistant to malaria would save all of those. The chance of that happening might be 5%, resulting in 20 million life-years saved.
Human News aims to devote 1 character to each 40,000 life-years, or 1000 average lives. Thus, the number of characters could be 20 million life-years / 40,000 life-years/character = 500 characters.