For that matter, how many quantum physicists would know how to even diagnose liver failure and what treatment to prescribe let alone understand the mechanism of the failure sufficiently to research a preventative or cure for it. It's pointless to try to say one is harder or easier or requires more intelligence than the others. You don't need in-depth knowledge in one field to address another, but, one shouldn't be oblivious to the other fields and their main areas of study either, because there are times when you may need to seek out advice from those in other areas and need to know those areas exist to do that.Monique said:People researching medical conditions are not always medics! As a biochemist you get training in chemistry; electron orbits and nuclear chemistry. So how many quantum mechanics people do you know who are familiar with biochemistry? To understand why a liver fails you don't learn much from electron orbits alone, you learn from biochemical pathways. You don't need to include quantum mechanics to understand a liver.