Briefly, there is a simulated population of humans who are updated at each five-day time step via model components representing new infections, parasite densities, acquired immunity, uncomplicated and severe episodes, direct and indirect malaria mortality, infectivity to mosquitoes and case management.
The second option is to accept the validity of the InterVA-4 malaria mortality findings reported here, in which case they add veracity to the parasite prevalence estimates.
Increases in parasite prevalence, health facility malaria case incidence, and malaria mortality during 2008 2010 were noted in Zambia and Rwanda, as well as sub-nationally in Malawi, suggesting that 2010 was an unusually high transmission year.
DALYs averted are calculated by combining burden of disease averted from less malaria morbidity (as a function of malaria incidence, length of disease, and impact on quality of life) and less malaria mortality (as a function of malaria incidence, case fatality rate (CFR) and country specific average life expectancy at age one year [23]).
Indicators used include the test positivity rate (the proportion of patients with suspected malaria who are tested for infection and test positive), malaria case incidence (i.e., confirmed malaria cases per 1,000 persons per year), and malaria mortality rate (inpatient malaria deaths per 100,000 persons per year).
Malaria mortality was derived from malaria incidence, assuming fixed case-fatality rates.
Its widespread use was highly successful in reducing malaria mortality but less efficacious in reducing the number of cases.
Insecticide treated bednets and anti-malarial medicine have already led to a 37% global decrease in malaria cases since 2000, and a 60% decline in the malaria mortality rate.
Vietnam has been extremely successful in controlling malaria; in 2000, malaria mortality had decreased since 1991 by 97%; by 2007, only 70,910 malaria cases and 20 malaria deaths were reported in a country of 80 million people, a 93.5% and 99.6% decrease compared to 1991 [2].
The malaria mortality rate (MTR) continues to decrease as has been the case since 2005 and remains well below the 1999-2006 average.
