Necrotizing enterocolitis, usually called NEC, is a condition where the intestines become infected and can begin to die. The disease usually affects premature babies, although term babies may also get NEC. Necrotizing enterocolitis is a serious condition that may require surgery, and has a high morbidity and mortality rate.
Bordetella vaccines are given to puppies at about 12 to 18 weeks. According to Doodle Dog Shop the Bardatella vaccine is optional at 6-8 weeks. There are three year rated rabies virus such as Imrab-1 that can be given to puppies at twelve to sixteen weeks as well.
Core vaccines for dogs are distemper, parvo, adenovirus-2, and parainfluenza. All puppies need those vaccines once every 3 weeks until it has received 2 vaccines after 14 weeks of age. So it depends on when the puppy starts vaccines as to how many vaccines end up being in the series and how old it is when it finishes. Dogs over 14 weeks of age only need 2 vaccines 3 weeks apart.