"Other countries, including Canada and Italy, have also used a clause in World Trade Organization rules to flout drug patents in the name of public health.BLOOMBERG: Brazilian President Luiz Inacio Lula da Silva broke the patent on Merck & Co's AIDS drug Efavirenz after the company's offer to cut prices failed to satisfy demands from the country's health ministry.Lula, in a presidential palace cere" . . . . .