Ключевые слова: arrow, boost, care, control, counter, cure, defense, design, disease, epidemic, fitness, flu, heals, health, healthy, high, illness, immune, immunity, immunology, improvement, increase, indicator, infection, level, lifestyle, low, measure, measurement, medical, medicine, meter, metering, people, prevention, progress, protect, protection, risk, rope, safety, scale, sickness, strong, support, system, test, treatment, vaccination, virus,