What’s the percent of fake medicines sold in poor countries?

(25)The World Health Organization estimates that 25 percent of medicines sold in poor countries are fake. Monitoring by the World Bank and others suggests the overall global trade in fake and substandard drugs is now more than $30 billion per year.(26 - 2)Experts are asking for stricter regulation and better international collaboration to check this public health menace.
    (26 - 1)Some 40 percent of the drugs available in many sub-Saharan African and South American countries are either fake or substandard—according to the research by the World Bank and international public health groups.(26 - 3)And experts say the widespread circulation of poor-quality or substandard medicines leads to frequent treatment failure and even loss of life.