The present invention relates generally to a diagnostic assay and, more particularly, an assay for measuring cell-mediated immune reactivity. The camera intermittently transmits the vibration detection signal from the vibration detection unit and time-related data to the driving control circuit. The first body includes a first end, a second end, and a middle section. The data receptacles of a form are filled with data when the user executes a data population command. One or more light switches are located on the outside of the housing for activating the light source. A method of sealing containers involving dispensing removable membranous seals from a continuous length and attaching the seals to standard containers.