Ingelvac PRRS MLV Vaccine – Recommended for use in healthy, susceptible pigs, as well as non-pregnant sows and gilts in PRRS virus-positive herds. Aids in the reduction of both reproductive & respiratory forms of the disease caused by PRRS virus. Dosage: Pigs - 2 ml IM to pigs 3 wks of age or older; Sows and gilts - 2 ml IM 3-4 wks prior to breeding, revaccinate 3-4 wks prior to each subsequent breeding. Not for use in boars or pregnant animals. 21 day slaughter withdrawal.