Hiprabovis IBR Marker Live is used to vaccinate cattle (cows and calves) against the respiratory infections caused by IBR. The vaccine is used to reduce the clinical signs of IBR and the excretion (shedding) of the virus by the infected animals. The vaccine is given to animals as two injections, three weeks apart, into the neck muscles. The first injection can be given to calves from three months of age. The injections should be preferably administered on the alternate sides of the neck. Afterward a single booster can be given every six months to maintain the vaccines effect.