Some bee are small in size and they usually come because of nasty environment. House flies leads with 65 disease that are Yaws, Tularemia, Dysentery, Typhoid etc. You can also identify the infestation of flies. Bees are less harmful than any other insects like rats but sometime it is very complex to remove them from our house they are like hostiles.
To get rid of bees you need to buy a chemical spray or other presentation methods can be taken. If we talk about flies it looks for warm temperature and to make them out from your home close your doors or windows tightly. Keep the surface of kitchen and other places clean and if then also no result is found you must contact pest controller like us.