Lance Cpl. Nancy Rascon, administrative specialist, receives a flu shot by Seaman Sabas Hernandez, medical reviewer, at Yale Hall on Oct. 22, 2013. Ninety percent of the Marine Corps is required to receive the flu immunization by Dec. 16, 2013. - Lance Cpl. Nancy Rascon, administrative specialist, receives a flu shot by Seaman Sabas Hernandez, medical reviewer, at Yale Hall on Oct. 22, 2013. Ninety percent of the Marine Corps is required to receive the flu immunization by Dec. 16, 2013.