Should Broncho-Vaxom be administered together with an antibiotic or after antibiotic therapy?

Good morning Can broncho-vaxom be given together with the antibiotic zinnat in 18 mc child? Initially, I wanted to give the vaccine itself and the son is already after 2 doses, but I am thinking about the successive use of this drug, but I am also afraid of complications after the antibiotic and a decrease in immunity. With a bacterial infection, is it better to continue taking broncho-vaxom alone, together with an antibiotic, or to bet on the antibiotic itself? The doctor gave us a choice.