Professor Chris Whitty has said there are some areas of the science around Covid-19 that there is still no answer for. Speaking at Westminster’s Science and Technology Committee, the Chief Medical Officer for England indicated some critical information about the virus remains unknown. Prof Whitty said: “We were starting off with a completely new disease, very large degree of uncertainty at the beginning. “There are still quite significant areas of science where we have considerable uncertainty and some areas of science where we have to say we simply don’t know. “And we might want to come back to that later in the session because some of the areas, some of the critical bits of information, we still do not know the answer.”