H3N2 Canine Influenza in Dogs: Daycare Risk, Symptoms, Vaccines & Isolation
H3N2 canine influenza spreads efficiently in close-contact dog settings such as daycare, boarding and shelters, but current 2026 USDA records do not support a national canine-flu vaccine shortage. Learn the 2–3 day incubation period, up-to-24-day shedding window, Cornell’s 21-day isolation guidance, current vaccine options and what to do after daycare exposure.
13 min
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