Question: When is the best time to cancel an event for coronavirus?

Answer passage (source: CDC):
page_title: Event Planning and COVID-19: Questions and Answers
section_headers: Planning and Preparedness
What are things to consider when determining if an event needs to be postponed or canceled?
section_content: Consult with local public health officials and continually assess, based on
current conditions, whether to postpone, cancel, or significantly reduce the
number of attendees (if possible) at an event or gathering. When determining
if you should postpone or cancel a large gathering or event, consider the:

Overall number of attendees or crowd size.
Number of attendees who are at higher risk of developing serious illness from COVID-19. This includes older adults and people with underlying health problems such as lung or heart disease and diabetes.
How close together attendees will be at the event.
Potential ways to minimize economic impact to attendees, staff, and the local community.
Amount of spread in local community and the communities from where your attendees are likely to travel.
Needs and capacity of the local community to host or participate in your event.


Reviewer feedback on this answer:
IT says to consult with local public health officials for canceling an event  but it doens't say when to do that.
The response comprises guidelines to follow when holding an event.

Reviewer ratings:
Acceptable
Excellent

Answer passage (source: CDC):
page_title: Event Planning and COVID-19: Questions and Answers
section_headers: Event cancellations
When does CDC recommend that I cancel or postpone an event?
section_content: If there is minimal or moderate spread of COVID-19 in the community, CDC
recommends cancelling an:

event that includes 250 people or more. 
3/16/20 UPDATE: During the next 15 days, all U.S. events of 10+ people should be cancelled or held virtually. 
More Information on Mass Gatherings
Read the White House noticepdf iconexternal iconpdf iconexternal icon


event likely to have 10 or more people who are at higher risk of serious COVID-19 illness. This includes older adults and people with underlying health problems such as lung or heart disease and diabetes.

If there is substantial spread of COVID-19 in the community, CDC recommends
cancelling events of any size. See page 9 of CDC’s Community Mitigation
Framework or definitions of “minimal, moderate, and substantial spreadpdf
iconpdf icon.”

Reviewer feedback on this answer:
IT says if there is a minimal or moderate spread, that is when the time is to cancel an event but it doesn't actually say how to know that.
The response somewhat answers the question.

Reviewer ratings:
Could be Improved
Acceptable

Answer passage (source: CDC):
page_title: FAQs for Administrators and Leaders at Community- and Faith-Based Organizations
section_headers: Substantial spread of COVID-19 in the local community
Should my organization cancel or postpone an event if there is substantial spread of COVID-19 in the local community?
section_content: You should first follow the directions of your state and local authorities. If
authorities do not have specific directions related to cancelling or
postponing a group event or activity, read CDC guidance on community
events.

Reviewer feedback on this answer:
The answer is according to the guidelines of the states.
The answer is too vague and it says to follow directions but gives no direct guidance on when to cancel events.

Reviewer ratings:
Excellent
Bad