Parrots can carry Psittacosis, a disease that is possible to contract as a human and can be very serious in both species. Many animals carry parasites, fungi, and bacteria that can be dangerous to us, especially if you are immune-suppressed/compromised in any way. The safest measure is to always wash your hands before and after spending time with or tending to your pets, and to bring new pets in for a check-up and infectious disease screening. Remember, if there is a concern about your health or your pets health, it’s always best to consult with a doctor.