The Wrath

By David Robbins

On an archaeological dig in the valley of the Dog People in Egypt, a pathogen is released that quickly spreads throughout Egypt and from there to the rest of the world. This disease affects the eyes, making them bulge out; the salivary glands, making the afflicted foam at the mouth; the joints and tendons, forcing the person into a hunched-over-on-all-fours stance; the brain, destroying the cortex and turning the person into a blood-thirsty, ravenous beast; and it causes an intense fever that results in the victim tearing off all their clothes and running around nude: thus the dog people.

As you can tell from the description, this is a rather silly book. Even the front cover of the book is silly, as it shows a hairy beast with huge fangs and pointed dog ears, which does not describe the sufferers of the dog people disease. Going by the cover you would think they turn into werewolves, but not so.
Another silly thing about the book, which was published in 1988, is that the doctors studying the infected people keep catching the disease and turning into dog people themselves. Like doctors in 1988 didn't understand how to deal with infectious diseases without exposing themselves to them.
But besides that, it's a pretty fair story, about struggling against an implacable foe and not always winning. But happily, the calvary arrives in the nick of time and all is not lost.