Ключевые слова: against, aggression, attack, bacteria, bacterial, bacterium, banner, biology, body, care, caused, character, concept, defense, design, disease, drug, fighting, flat, germ, health, healthy, help, human, illness, illustration, immune, immunity, immunization, immunology, infection, infectious, male, man, medical, medication, medicine, protect, protection, protective, reflecting, resistance, safety, shield, strengthened, strong, system, text, virus,