Since you were a little kid you were thought to flush the toilet when you are done, and this still applies, and nothing has changed.
The problem is that when you flush the toilet germs are spreading from the toilet bowl. What we want to say is that if you want to avoid this, read the following article and learn some new tricks that will protect you from germs and still allow you keep the toilet hygiene on a high level.
What you need to know is that you mustn’t flush the toilet for no reason. If you haven’t been at the bathroom it means that the toilet is clean. Also don’t flush the toilet twice for “just in case”. This way you are not doing good, but completely the opposite. The first flush was just enough, and the second one was for nothing, and germs were spread in the toilet.