Bronchi-Shield Presentation Bronchi-Shield is a combination vaccine presented as a lyophilisate and solvent for suspension for nasal drops. Each dose comprises: one vial of lyophilised fraction containing live attenuated Bordetella bronchiseptica, strain 92B: 2.1 x 106 to 5.5 x 108 CFU* per dose; and one vial of sterilised water for injections (Ph.Eur.) (*) CFU: colony forming unit