Ключевые слова: adult, altruism, arm, background, banner, blood, blood donation, blood donor, blood type, care, clinic, closeup, couch, donate, donating, donation, donor, expertise, give, giving, hand, heal, healing, health, health care, healthcare, help, hospital, indoor, laboratory, man, medical, medical clinic, medical face mask, medicine, omicron, patient, person, serum, sitting, social, system, transfusion, vaccination, vaccine, venous, volunteer, woman,