The government's Expert Group on Countermeasures against New Coronavirus Infectious Diseases states that as a common condition in cases where cluster (outbreak) infection has been confirmed, caution must be exercised when the following three conditions are simultaneously overlapped.
・ A closed space with poor ventilation ・ A lot of people are crowded ・ Speaking and speaking at close distances (close scenes)
In places and scenes where these three conditions are simultaneously met, please take the following actions.
1. Ventilate (if possible, open windows in two directions simultaneously)
Decrease the density of two people (leave each other about 1-2m apart)
3. Avoid short-range conversations and remarks (if necessary, wear a mask)