Keywords: عفونت های انتروک; OPV; oral polio vaccine; RV; rotavirus vaccine; NPEV; non-polio enterovirus; EV; enterovirus; PROVIDE; Performance of Rotavirus and Oral Polio Vaccines in Developing Countries; IPV; inactivated poliovirus vaccine; EAEC; enteroaggregative E. coli; EIEC; en