It depends on how risky the area where you live is regarding the diseases they're being vaccinated for in those last two rounds. Some places you're probably fine with a little basic risk mitigation but in other places various diseases can be super endemic. It can vary year to year, too. Personally, I'd take your vet's advice as they have personal knowledge of whether there are local outbreaks or not.
Note that vaccinations aren't instantaneous, either - it takes a while after the jab for dogs to build up the antibodies necessary to prevent disease.
Note that vaccinations aren't instantaneous, either - it takes a while after the jab for dogs to build up the antibodies necessary to prevent disease.