You can't give honey to infants under one year of age.
You have to wait until a baby is at least 12 months old before you give them honey.
ーYou can't give honey to infants under one year of age.
「１歳未満の乳児にハチミツをあげちゃダメ。」
infant で「乳児」
under one year of age で「１歳未満」
ーYou have to wait until a baby is at least 12 months old before you give them honey.
「乳児が少なくとも１２ヶ月になるまでハチミツをあげるのを待たなければいけない。」＝「あげちゃダメ」とも言えますね。
baby で「赤ちゃん・乳児」
at least 「少なくとも」
ご参考まで！
カナダ 
