So a 74xx244 works at a commercial operating temperature, while a 54xx244 which is the same logic device [maybe the same pinout, and package] will continue to operate to the military operating temperature range [which is wider].
A distemper vaccine is more than a preventive against canine distemper virus. This vaccine, considered a core vaccine for all dogs in the United States, also protects against a host of other diseases you may not know your dog is susceptible to. These can include adenovirus, parvovirus, and others.
A. Canine distemper is a virus that affects a dog âs respiratory, gastrointestinal, respiratory and central nervous systems, as well as the conjunctival membranes of the eye.f you have a puppy, make sure he gets his first vaccination at six to eight weeks of age. Be sure to keep him away from any possibly infectious dogs or environments until heâs finished with his vaccinations at four or five months old.