The use of immunomodulators in vaccination of cattle Mikhail Staroselov, Natalia Basovа, Sergei Prutsakov, Petr Miroshnichenko and Nikolai Zabashta E3S Web Conf., 175 (2020) 03004 Published online: 29 June 2020 DOI: 10.1051/e3sconf/202017503004