The ones that are being used also require being re-treated once a year.
正在使用的蚊帐需要每年重新处理一次。
2
But again in Eritrea it's worked well as of the 800,000 odd bed nets, at least half a million of them are being re-treated every year.
但厄立特里亚在这方面做得相当好，80多万套蚊帐中，每年至少有50万套被重新处理。
3
MethodsThe re-treated smear positive patients with PTB were inquired of the past medical history and the usage of drugs, and were implemented the chemotherapy regimen recommended by WHO.