But at least 18 companies from Belgium , China , France , Ghana , India , Kenya , Switzerland and Vietnam make the drug as a pill that can be taken by itself , in what doctors call monotherapy , and sell it cheaply in Africa , Asia and Latin America .
Asia /location/location/contains Vietnam
Africa /location/location/contains Kenya
Asia /location/location/contains India
Asia /location/location/contains China
Africa /location/location/contains Ghana
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