In SimCity 4, people would rather live next to a dump than a Disease Research Center, simply because the DRC produces radiation, which in the SimCity world is a very bad thing that will drive people away (in real life, everything produces radiation). This merely takes away the radiation factor from all new Disease Research Center and Advanced Disease Research Center units, though it won't stop damage from previous ones or prevent protesters (annoying but harmless), and thus makes the simulator more realistic. There is an attached read me file that explains more.   This was produced with ilives reader, but I understand that some people don't have the desire to muck around in it (or have a Mac)--that's why I produced this mod. It's very small and simple (1KB) but does the trick.   UPDATE: added mod for Advanced Research Center in the ZIP