definiens: or shall mean : ( a ) the MN isolate of the Vaccine manufactured and supplied by [COMPANY] for use by [COMPANY] or its sublicensees in a PLA - Enabling Clinical Tria l or other clinical trial in humans in compliance with Good Manufacturing Practi ces at the protein concentration, formulation and fill volume produced by [COMPANY] as part of its normal manufacturing and fill process for the Vacci ne ( the ) ; and ( b ) each and every other cl inical isolate, strain or other variant of the Vaccine, if any ( a or ), which shall be covered by [COMPANY] 's o ption to manufacture and supply under Article 4 below . The First Generation Clinical Vaccine and each such Vaccine Variant ( if any ) are each also referre d to hereinbelow singularly as a of Clinical Vaccine, and collectively a s the " Clinical Vaccine(s )