Mosquitoes are more annoying than dangerous in most parts of Iran, but it is a good idea to bring some repellent lotion.
The choice of electric vaporizers is limited, but spare tablets are on sale in pharmacies, supermarkets, and large groceries.
There is no great threat of rabies. However, if bitten or scratched by an animal, wash and cover the wound, and go straight to a hospital. If you go into a ruined building, make excessive motion so that snakes, if there are any, retreat.