definiens: means any and all uses in humans of Vaccines that are indicated and/or used for the following Indications ( each of which constitutes an ): ( a ) Prevention of Alzheimer 's Disease 1 CONFIDENTIAL TREATMENT REQUESTED Restricted R e COnfkl .... tlDl lI",lted acces $ ( b ) Prevention of Infection with Group A or Group B streptococcus ( c ) Prevention of Infection with Streptococcuspneumoniae ( d ) Prevention of Infection with Respiratory Syncytial ViruS ( ) ( e ) Prevention of Infection with Cytomegalovirus ( ) ( f ) Prevention of Infection with Neisseria meningitides ( g ) Prevention of infection with Chlamydia trachomatis ( h ) Prevention of infection with Chlamydia pneumoniae ( i ) Preverition of infection with HSV-2 G ) Treatment of diseases directly caused by HSV-2 1.3 means any Vaccine which contains CpO 7909 co - formulated with one or more Antigen using the Delivery Method for any and all uses in an Additional Field for which Merck has exercised its Option under this Agreement