Oh no I posted liver. Ooops just showed my ignorance. My dad reminded me that the liver grabs proteins which do not have sialic acid on them. More exactly which have galactose on them which galactose is not covered by sialic acid. My confidence shaken, I don't dare propose linking galactose to say quinine. The reason is, that I am not sure if the liver grabs galactose or grabs only proteins with a short chain of sugars ending with galactose. Besides I'm sure this is extensively studied. There is the possibility that malaria is so third world that reasonable treatment strategies are not explored, but hepatitis B and especially C are big enough problems in rich countries that get it to the liver has been explored for sure.