grants interest from the n.i.h. starting in 2002. i later received supplemental funding from the bill and me linda gates foundation. other research was funded by c.d.c. and gates. the u.s. funded the majority, investing hundreds of millions of taxpayer dollars. scientists discovered that adding a drug increased protection and the combination of those two medications which is f.d.a. approved. also it was found that pre- exposure your dozing added substantially to protective events and it's these inventionings that led to c.d.r. patents awarded several years ago. gilead did not privement provide leadership or funding for prep research. their role was to providing placebos. ghim gill made public in twifewoy -- 2005 it would not seek f.d.a aprove for prep who -- no matter what the data showed. gilead took steps to limit research on alternative and competing prep agents. in particular, there was interest in 3 t.c., a competing drug, because it was on a -- about to go off patent. interest dissipated with assurances that gilead's truvada would be generally available by the time efficacy trials were completed. eight years