Yamada : The number of malaria cases has declined by at least half in 25 countries . Comment: Zambia expanded the use of insecticides , bednets , and appropriate treatment . Bill & Melinda Gates Foundation helps funding a malaria control program .
Yamada : The number of malaria cases has declined by at least half in 25 countries . Zanzibar has virtually eliminated the disease over the past five years . Zambia expanded the use of insecticides , bednets , and appropriate treatment . Bill & Melinda Gates Foundation helps funding a malaria control program .