Ключевые слова: america, american, background, black, color, disease, doctor, drug, emergency, fabric, flag, flu, freedom, health, hospital, immunization, independence, injection, inoculation, laboratory, medical, medicine, memorial, microscope, mumps, needle, nurse, pandemic, patient, patriot, pattern, pharmaceutical, protection, red, research, stars, syringe, technology, usa, vaccine, vintage, virus, wave, waving, wavy, white, wind,