Ключевые слова: concept, condition, control, crisis, cube, cubes, disease, doctor, down, emotion, end, epidemic, flu, hand, health, healthy, immune, immunity, immunization, injection, level, lifestyle, male, man, medical, meet, orange, pandemic, protection, quarantine, question, sars, serum, stress, success, symbol, system, table, up, vaccination, vaccine, virology, virus, word, words,