wonderful tutorial, thanks a lot frndofyaweh!
you mentioned a long time ago here that citizens don't like to live next to the disease research center: that's because it's radioactive! check your "radiation" map. btw, the advanced research center has the same problem, i always put those two far, far away from my residential zones (but the people still come to the disease research center)!!
anyway, thanks a lot for this great cj!