A tier-one country has confirmed resistance; a tier-two country is one that neighbours or has a significant migrant flow from a tier-one country. Tier three includes everywhere else, including Africa.
一线国家是经证实存在耐药性的国家；二线国家与一线国家相邻或有大量来自一线国家的移民；包括非洲各国在内的其它国家为三线国家。
A tier-one country has confirmed resistance; a tier-two country is one that neighbours or has a significant migrant flow from a tier-one country. Tier three includes everywhere else, including Africa.
一线国家是经证实存在耐药性的国家；二线国家与一线国家相邻或有大量来自一线国家的移民；包括非洲各国在内的其它国家为三线国家。
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