Better to visit them on sunday and get the exact appointment date for immunization. In case of emergency for babies go to Al Wakra Hospital - Pediatric emergency dept it is open 24x7 7 days a week. Registration can be done at PEC-Al Wakra Hospital also if your baby is not well and the file can be created there as well. But remember that for vaccinations you will have to visit first the Health Centre hence better go between SUNDAY - THURSDAY 7AM-1PM. Hope this helps.