I spent the first decade after I left college working in the hospital. The thing you always have to worry about there are germs making you sick and spreading them to other people that you see.
Every hospital I have ever seen used UV light to kill airborne germs, the tech is known to work well. A new gadget has turned up called the UVmini that uses this tech to kill germs on your toothbrush.
This is important because if you have been sick and keep using the same toothbrush odds are you will get sick again. The gadget oddly gets its power from a USB port. The UV light promises to kill 99.99% of germs on your toothbrush. A version with a rechargeable battery is also available. Pricing and availability is unknown.