Bordetella is required to be current by 12 months from date of vaccine. Most veterinarians recommend the Bordetella vaccine be given every 6 months to maintain a high level of immunity for dogs who are often in social settings. Why? The Bordetella vaccine helps control and prevent the spread of germs that cause canine cough. If a dog that has been vaccinated with the Bordetella vaccine and still acquires canine cough, they will have a less severe form that resolves faster than a dog who is not vaccinated. The germs that cause canine cough are very similar to the common cold in humans with mild coughing and sometimes a runny nose. Symptoms usually resolve within a week.