There are many causes of thrombocytopenia. Your doctor may tell you that you have a form of the condition called immune thrombocytopenia (ITP), which is one of the most common causes of low platelets in people who do not have symptoms. You may hear it referred to by its old name, idiopathic thrombocytopenic purpura.
How the chickenpox vaccine works. The chickenpox vaccine is a live vaccine and contains a small amount of weakened varicella zoster virus. The vaccine causes your immune system to produce antibodies that will help protect against chickenpox. Read more about live vaccines. Read more about chickenpox vaccine side effects.
Disease and vaccine facts. 1  FACT: Adults are more likely than children to die or have serious complications if they get chickenpox. 2  FACT: Chickenpox can be prevented with a vaccine. Sometimes vaccinated persons come down with chickenpox but the illness is usually mild with fewer than 50 lesions.