Ключевые слова: background, cardiac, cardiology, clinic, concept, copy, copy space, coronavirus, covid, diagnosis, disease, doctor, epidemic, flu, healthcare, healthcare concept, heart, heartbeat, hospital, illness, infection, medical, medical test, medicine, no people, nurse, overhead, overhead view, patient, physician, red, red heart, shape, sick, space, stethoscope, test, view, virus, white, white background,