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.
That is why natural infection with varicella virus causes illness, but varicella vaccine virus doesn't. However, because the varicella vaccine virus reproduces itself a little bit, it induces immunity against varicella that is, like the immunity to rubella, measles or mumps virus, likely to be life-long.o, although chickenpox causes much less severe disease, permanent disabilities and death than other diseases such as polio, measles or rubella, it still is an important cause of severe disease in children. On the other hand, the varicella vaccine does not have serious side effects.