(Merck) 5-way + coronavirus Modified live plus killed coronavirus. For protection against canine distemper, adenovirus type 2 (and hepatitis), parainfluenza, parvovirus and coronavirus. For dogs 6 weeks of age or older. Give 1 ml IM or SQ. Beginning as early as 6 weeks of age, give every 2 to 4 weeks until 12 weeks of age. A minimum of two doses is required for primary immunization. Annual revaccination with a single dose is recommended. Not for pregnant bitches. Requires mixing. Order syringes separately.