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.
When should my child be vaccinated? All preteens should get one Tdap shot when they are 11 or 12 years old. If your teen is 13 years old up through 18 years old who hasnât gotten the shot yet, talk to their doctor about getting it for them right away.