The Dual Vaccinator features two fixed 1mL barrels, one for Glanvac and one for Eryvac. When the plunger is depressed, Glanvac and Eryvac are combined at the rear of the vaccinator in a 2mL reservoir before travelling through a single barrel and needle. Delivering two vaccines at the same injection site saves time and maximises convenience. The Dual Vaccinator is only registered for use with Glanvac and Eryvac