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.
After vaccination, some people (about 1 person in 10) do not develop enough protection to completely prevent them from developing chickenpox. For the chickenpox vaccine, about 8 to 9 out of every 10 people who are vaccinated are completely protected from chickenpox.The vaccine almost always prevents against severe disease. If a vaccinated person does get chickenpox, it is called a breakthrough infection.n Overview of Chickenpox After Vaccine. It is possible to develop chickenpox after getting the chickenpox vaccine. There are two situations where this could occur. The more common of the two is a breakthrough infection. Very rarely, chickenpox can occur from the chickenpox vaccine itself.