So even with partial subsidy, three dollars is still not the full cost of a bed net, and now you only have 20 percent of the people with the bed nets, you lose the health immunity, that's not great.
ですから 補助金を出しても ３ドルでは蚊帳は作れませんし 蚊帳を手にするのは わずか２割 集団免疫が落ちるので 良くありません