the strains of disease agents to which the product is intended to confer immunity is largely absent in terms of geographic spread from the territory concerned.
den chuid is mó, níl tréithchineálacha na n-oibreán galair a bhfuil an táirge ceaptha imdhíonacht a thabhairt ina n-aghaidh i láthair ar an gcríoch i gceist ó thaobh scaipeadh geografach de.