Avaxim is the hepatitis A immunization.It should be given at 12 months and again at 18 months. If your son had his second dose at 21 months instead of 18 months then this is quite in order and there is no need for concern. This vaccine is not responsible for your son developing sores. It is more likely that these sores are due to a skin infection called impetigo which commonly occurs in young chldren especially those who frequently come into contact with other children.
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