My son is 4 month old..he had his vaccination on 6th march 2023..one of the vaccination hexaxim (DTPa-hepB-IPV-Hib) given was expired in November 2022..no side effect till now( 144 hours have passed since vaccination) but i want to ask whether can it cause trouble later and also can it create some issue in future? Also tell me is vaccine have some potency after expiry as i have read it does have till 6 months after expiry and if it has some potency,then should i give another dose to my child or not and if yes when should it be given?