2011年8月9日星期二
Combating Malaria Part II [analysis]
Optimum protection can be provided by applying repellents. The CDC recommended insect repellent should contain up to 50 per cent DEET (N,N-diethyl-m-toluamide), which is the most effective mosquito repellent for adults and children over 2 months of age. Combating Malaria Part II [analysis]
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