Opsec

General

Mention only as much information as necessary to get an idea across– you can always give more information later, but you can't take information back.

Physical

Photos

Don't post pictures taken at a location until you've left that location and anywhere near that location for several hours

Be mindful to avoid capturing reflections in mirrors and glass

Housing

Verbally verify the identity of the person entering before opening the door. Deadlock hotel room doors.

Biosecurity

When groups of 4 or more people gather together after plane travel, they can reduce the cumulative risk of infecting each other by wearing a seal-checked N95 mask or better at the airport and on the flight. KN95s are less effective and less comfortable, so 3M Aura N95s are recommended instead.