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. 2004 Jan 15;99(1):43–49. doi: 10.1016/j.vetmic.2003.07.009

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Fig. 1 — Serological responses in dogs after CCoV vaccination and CCoV challenge: (◆) dogs vaccinated by intramuscular route; (•) dogs vaccinated by oronasal route; (○) unvaccinated dogs. VN titers are expressed as the reciprocal (log₂) of the geometric means. ELISA OD median values are shown in brackets.