If I previously got only one chickenpox vaccine dose, should I get vaccinated again?

The MMR vaccine is completely safe, and does not cause autism. Vaccination is very important because it prevents diseases that can cause permanent complications and death. In the case of the MMR vaccine, it prevents measles, mumps, and rubella. Measles complications include ear infection, diarrhea, pneumonia, brain damage, and death. Mumps complications include swelling of the testicles or ovaries, deafness, inflammation of the brain and/or tissue covering the brain and spinal cord (encephalitis/meningitis) and, rarely, death.

Thank you Jxnxlxx for your question. It's a common question that is posed to us. A vaccine is essentially a "weakened" form of the virus, it is trying to make your own body immune system react to it. So even if you are already infected before and immune, taking another vaccine would do no harm. (Your body "remembers" these past infections and makes you "immune) Testing is usually expensive and takes about a week, and even if the test is negative, you could still be immune, because your body stores the "memory" somewhere.