All of us have been kept alive by various drugs that we have taken over the years. Most, if not all, of these were generic drugs, i.e. they were in every way identical copies of the original molecule. The patent on the original drug may have expired, enabling other manufacturers to make these copies at low cost. Alternatively, some countries, including India, did not recognize product patents; and therefore, low-cost generics could be made by other manufacturers legally, even when the product was covered by a valid patent in other countries.
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