it's impossible (i.e. illegal) in Germany to be uninsured. you may have to pay yourself depending on the situation (I had to do it once between jobs), but the amount you have to pay is not crazy, and there are no people who have no health insurance because they can't afford it. For example, if you are eligible for ALG II (aka Hartz IV, i.e. long-term unemployment benefits), your health insurance is automatically paid for.