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.
The good news is that a vaccine is available that provides excellent protection from distemper. Feline panleukopenia is the official name for feline distemper. The virus that causes the disease is called the feline panleukopenia virus, or FPV. Itâs a member of the parvovirus family. The word âleukopeniaâ means a low white blood cell count, which is one of the major signs of feline distemper. Pan means that all types of white blood cells are reduced in number.