They not only prevent infections but may also reduce the severity and duration of dog flu in case your pet gets sick. (allstarpetresort.com)
A mild case of dog flu typically last from 10 to 30 days and the animal improves on its own with symptoms gradually going away. (barbaraspetcareservices.com)
UPDATE: Well, as of recently, there doesn't seem to be a dangerous outbreak of dog flu as predicted. (samthedogtrainer.com)