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Fostera PRRS is a porcine reproductive and respiratory syndrome vaccine. For vaccination of healthy, susceptible swine in PRRS virus-positive herds or seronegative pigs deemed at risk to exposure to PRRS, or in preventing disease associated with Porcine Reproductive and Respiratory Syndrome Virus. Aseptically rehydrate the freeze-dried vaccine with the sterile diluent. Shake well and administer 2 ml IM to pigs 3 weeks of age or older. Do not vaccinate boars of breeding age. Modified live. Requires mixing.