House Screening Versus Nets, Priced per Bite Prevented: A Comparison Bound for House Entry, Under-Net Exposure, and Their Combination

Comparison of house screening and insecticide-treated nets priced per bite prevented for a reference child, from a compartment model of outdoor, indoor awake, and indoor asleep biting integrated over six years. SIMULATED, NOT MEASURED; nothing was built and no net or screen described was used by any child. Nets prevent 9,182 bites per child over six years at $0.62 per 1,000 bites prevented; full house screening (eaves closed, windows and doors screened, $110.50 per house) prevents 9,625 bites at $6.44 per 1,000; both together prevent 12,964 bites at $5.22 per 1,000 after charging the combination for screening's ventilation penalty (ventilation ratio 0.54, indoor temperature excess +1.24 C, net use 0.75 to 0.57). Adding nets to a screened house costs $1.71 per 1,000 extra bites; adding screening to a netted house costs $16.39 per 1,000 extra bites. The price ranking does not reverse under any single plausible change and reverses only jointly or where screening cannot be installed (unsealable houses, renters).