Figure 2From: A four year longitudinal sero-epidemiological study of bovine herpesvirus type-1 (BHV-1) in adult cattle in 107 unvaccinated herds in south west England Mean herd BHV-1 seroprevalence and 95% CI for seropositive herds by herd size (Numbers indicate the number of herds in each category). Herds are dichotomised by presence of seroconversion.Back to article page