I have a holiday cottage that I let through Airbnb. Their current policy is as follows:
^Reservations made on or before 14 March 2020 for stays and Airbnb Experiences, with a check-in date between 14 March 2020 and 14 April 2020, are covered by the policy and may be cancelled before check-in. Guests who cancel will receive a full refund, and hosts can cancel without charge or impact on their Superhost status. Airbnb will refund all service fees for covered cancellations.
The host’s cancellation policy will apply as usual to reservations made after 14 March 2020, and to reservations made on or before 14 March 2020 with check-in dates after 14 April 2020.^
I'm sure that if the crisis continues, the policy end date will be extended. So far I have had two cancellations, but some guests are still choosing to stay.