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.
Transient rash in up to 5% of recipients. As the vaccine contains live viruses, it is probably due to vaccine-induced modified measles. Varicella vaccine. Varicella lesions may appear at the injection site in approximately 3% of recipients. In another 3% the lesions may be more generalised. A zoster-type rash may rarely appear after a varicella vaccination. Another live virus vaccine that can cause vaccine-induced illness.