The other 2 arteries that bring blood to the brain, called the vertebral arteries, supply the brainstem. Plaque in the vertebral arteries is much less likely to break off and cause a stroke, but narrowing in the vertebral arteries can cause problems if the brainstem does not get enough blood flow.
A child should receive the first shot when he is between 12-15 months, and the second when he's between 4-6 years of age. If you're not sure if you have had the diseases or the vaccines (prior to 1971 it was given in three separate shots), you can get the MMR vaccine as an adult.
Second, two studies have shown that children who get the MMRV vaccine for their first vaccinations when they are 12 through 23 months old are about twice as likely to have a febrile seizure in the 5 to 12 days following vaccination compared with those who receive the MMR and varicella vaccines at the same visit.econd, two studies have shown that children who get the MMRV vaccine for their first vaccinations when they are 12 through 23 months old are about twice as likely to have a febrile seizure in the 5 to 12 days following vaccination compared with those who receive the MMR and varicella vaccines at the same visit.