Vampires do not exist. But, if you are a believer, I don't think they do. They're seemingly indestructable and can't die.
no
Their immune system becomes weaker.
Your immune system or your live, but you have to have healthy liver to filter out all your diseases.
gets diseases
The Immune System
The immune system
No, vampire bats can also transmit other diseases such as rabies, Bartonellosis, and other blood-borne pathogens. It is important to take precautions if you suspect contact with a vampire bat to prevent the transmission of these diseases.
Their immune systems were not used to diseases, as there weren't a lot of diseases at the time.
Diseases are caused by germs and viruses attacking your immune system.
your immune system protects you from diseases, well depending on how healthy it is.
Autoimmune diseases
Sunscreen. Lots of sunscreen.