the symbol means percent and the abbreviation means Vital Capacity.
Explanation:
Vital capacity is the volume of air that can be expelled from the lungs after maximum deep inspiration. The acronym used by to represent vitality is "CV". Generally, vital capacity is measured using a device called a spirometer, the result is given, usually with the symbol "%" which means percentage. Usually the man has a CV of about 4.5 liters and the woman a CV of around 3.2 liters.
