Vaccination with a multivalent modified-live virus vaccine administered one year prior to challenge with bovine viral diarrhea virus type 1b and 2a in pregnant heifers. Bov. pract. [Internet]. 2013 Feb. 1 [cited 2024 Nov. 22];47(1):22-3. Available from: https://bovine-ojs-tamu.tdl.org/bovine/article/view/188