Whopping Cough vaccine is the P in the vaccines get in their initial ones (usually under 3). P is Pertussis. There has been a re-emergence of the disease, either from unvaccinated folks or mutation of the disease (like flu does). Recently the recommendations are that adults have the Pertussis booster as part of a Tetanus booster, and is you are around babies, you may speed up your booster schedule to protect the baby until he gets full protection by immunization. I learned this recently as my DD was expecting. I did a lot of research, as I am allergic to the Tetanus vaccine, and was trying to find Pertussis without Tetanus.