a mechanism, excluding the original delivery means, by which a biological agent may be transported and transmitted to a susceptible host. Typically, this could include contaminated supplies and materiel as well as insects, bioloogilise ründeaine vastuvõtlikule peremeesorganismile kandja, v.a nakkuse esmased ülekandevahendid ja -viisid; nakkusekandjad on tavaliselt saastunud varud ja materjalid, aga ka putukad