If you forget to take the parvovirus vaccine before breeding, you don’t need to take it again, because the parvovirus vaccine takes about half a month to produce antibodies. If it is not given in advance and then given again, it will not have any effect, but will affect the pregnancy rate and conception. rate, so if you forget to hit it, you don’t need to hit it again. If you are not vaccinated, you need to pay attention to disinfection, keep the environment clean and hygienic, and prevent infection with parvovirus.