Canine distemper is a contagious and serious viral illness with no known cure. (dublinanimalhospital.com)
Canine distemper is a very contagious and serious viral illness which has no cure. (thesprucepets.com)
This is particularly important for people recovering from illness, who may already have an impaired immune response, or at times of the year where viral illnesses are prevalent. (sciencedaily.com)