My Son is 18 Months old, when he was 12 months old Hepatitis- A vaccine's first does given and as per the chart we should give the 2nd dose on 18 months. (chart provided by appollo chennai). So I just wanted to know whether we should give him when on extract age of 18 months old or what is the max age for giving Hepatitis - A vaccine's 2nd does.

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