Vampires do not exist. But, if you are a believer, I don't think they do. They're seemingly indestructable and can't die.
As vampires are entirely fictional creatures, any diseases or immunities would depend on the author of the story.
To have an auto immune disease, your immune system has to be totally active. Most of the auto immune diseases are most probably caused by undiagnosed chronic infections. Your body will not attack the body proteins for no reason. Very shortly, you will find out the treatment for most of the autoimmune diseases.
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.
Autoimmune diseases
your immune system protects you from diseases, well depending on how healthy it is.
Diseases are caused by germs and viruses attacking your immune system.