COVID‐19(3) Coronavirus disease 2019(2) pandemic(2) coronavirus disease(2) Japan(2) reported(2) Critical(1) Asymptomatic(1) herpes zoster(1) patients(1) Infection(1) sore throat(1) Research(1) respiratory symptom(1) Containment(1) investigated(1) asymptomatic: health security(1) COVID‐19 patient(1) feasible(1) public health(1) sashimi(1) cough(1) Pain(1) Transmission(1) segmental unilateral motor paralysis(1) Acute kidney injury(1) initial symptoms(1) Mass testing(1) Primary outcome(1) public policy(1)