Ключевые слова: art, background, bacteria, biology, black, button, cell, color, colorful, contour, coronavirus, covid19, disease, flu, guard, health, human, icon, illness, illustration, immune, infection, influenza, isolated, line, linear, lineart, location, medical, medicine, microbe, microbiology, ncov, neon, organism, outline, pandemic, protect, protection, safety, science, security, set, shield, symbol, system,