asymptomatic disease; awareness; China; consultation; contact examination; coronavirus disease 2019; coughing; diarrhea; editorial; educational status; general hospital; general practice; general practitioner; Germany; government; health care system; health center; health education; human; incidence; infection risk; isolation; Italy; mortality; pandemic; personal experience; practice guideline; prediction; quarantine; risk factor; sneezing; throat culture; World Health Organization; protective clothing; SARS coronavirus 2 test kit; ventilator