Drug firms cut vaccine prices in developing world – This is good news: Several major drugs companies have announced big cuts to the amounts they charge for their vaccines in the developing world. GSK, Merck, Johnson & Johnson and Sanofi-Aventis have agreed to cut prices through the international vaccine alliance Gavi. I can think of one problem, however, aside from the antivax conspiracy theory nonsens that will arise, and that's the potential for blackmarket profiteering…