Whooping cough vaccine

When are you offered the whooping cough vaccine. My mum says I've had all my childhood immunisations but I think I'm just in the age bracket where they stopped routinely immunising kids for it. A colleague at work had whooping cough and was off work for weeks. She was coughing so much it would literally make her vomit. I don't want my baby to catch it and it's doing the rounds amongst all the school kids as is croup.