@Yvonne-And-Bryan0 If AirBnB tries to give the guests back the money explain their own extinuating circumstances policy to them. It only covers the people on the the trip, not others not traveling with the group.
Circumstances that require documentation
Serious illness of a host, guest, or any member of the traveling party. You’ll be asked to provide a general statement from a physician confirming that the person can't travel. The statement must be dated after the reservation was booked.
https://www.airbnb.com/help/article/1320/what-if-i-need-to-cancel-because-of-an-emergency-or-unavoid...