25-29, BACKGROUND, BREATH, CLOSE, CLOSED, COVERING, DAY, EQUIPMENT, EYES, FEMALE, GAS, HEALTH, HEALTHCARE, ILLNESS, INDOORS, LIBRARY, MASK, MEDICAL, MEDICATION, MEDICINE, MOUTH, ONE, OPERATION, OXYGEN, PATIENT, PEOPLE, PERSON, PROCEDURE, RESUSCITATION, SCIENCE, UNCONSCIOUS, UNWELL, UP, WOMAN, WOMEN, YEARS, YOUNG,