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30 years
If I am following a 2, 4, 6, 8 etc. schedule for my son's vaccines, can I vaccinate him at 3 and a half month for instance or should I wait until he's exactly 4 month old?Does it have any side effect?
Dec 2, 2014

Dr. Zakia Dimassi Pediatrics
As a general rule, the time interval between two doses of the same vaccine is about one month. So it shouldn't be a problem to vaccinate a child two weeks earlier than the scheduled time. In any case, you should better discuss this with your child's pediatrician.
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