Attenuated virus can be applied by scarification to axillar or tail base, causing scabs to fall off in 30 days. Annual '''vaccination''' of ewes at least 8 weeks before lambing (all in contact should be done simultaneously) is required. In an outbreak, all lambs can be vaccinated . | Attenuated virus can be applied by scarification to axillar or tail base, causing scabs to fall off in 30 days. Annual '''vaccination''' of ewes at least 8 weeks before lambing (all in contact should be done simultaneously) is required. In an outbreak, all lambs can be vaccinated . |