When you visit Maidstone, you don't need to worry about your health too much. There aren't any crazy diseases floating around in England that you need to be immunized for before traveling. As for your safety, you don't need to really look behind your shoulder everywhere you go in Maidstone. This is a pretty safe town to visit, and there aren't too many criminals lurking behind the corner. As always, you should exercise caution when you are a traveler. You shouldn't leave your wallet or mobile phone out on a table--whether it be an outdoor cafe or ticket stand. You shouldn't walk around with your camera slung around your neck. That is always a sign that you are a tourist. Granted, some people will be able to tell you are a tourist anyway, but you don't want to advertise it for everyone to see. You should never leave anything behind in the room that is important to you. Another big thing is that you should always have your passport on you at all times, no matter what. Keep it in a secure place and check for it every now and then. It might seem like a hassle, but it's better to check every hour rather than having to wait in line at the embassy for a new one. If you encounter any problems you can contact  Maidstone police or if it is really bad you can contact your embassy.