Page "Canine distemper" Paragraph 30
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Wikipedia
The irresponsibility of pet owners is another factor that contributes to ongoing outbreaks of canine distemper.
Puppies begin vaccination beginning at six to eight weeks of age, and then continue getting the “ booster shot ” every two to four weeks until they are 16 weeks of age.
These dogs are not protected against the virus, so are susceptible to canine distemper infection, continuing the downward spiral that leads to outbreaks throughout the country.
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