From the RACV website: “… Yesterday afternoon, amid increasing concerns over the spread of COVID-19, British Columbia’s Public Health Officer directed “all event organizers to cancel any gathering larger than 250 people.” Respecting this new directive and until further notice, and out of prudent concern for the well-being of the entire community, attendance at Mass or any other Church events in the Archdiocese of Vancouver is to be restricted to a maximum of 250 people.”

Full announcement here: https://rcav.org/coronavirus/