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 âDâ in the DHLPP means that the vaccine protects against distemper. This extremely contagious viral infection can be deadly, especially in puppies or in dogs weakened by other illnesses, stress or old age. A dog with distemper generally looks very ill, with runny eyes and nose, coughing and a fever.