Your crew should be safe(r) as long as they wear a mask (aka 'face-mask') and maintain a six-foot anti-social distance.
These are the official dictates... science.
Do not question it.
How many of their inoculation series did they get?
How prepped are they to double-mask?
Are their double-masks in different colors so OfficialsAndAuthorities can determine submission at a glance?
'At a glance' means 'without violating anti-social distances'.
As long as they can furnish inoc documents, they should be safe(r).
To be safe(r), should they get re-inoculated?
Should you ask at your local branch of the Surge Patrol?
Various versions of inoc dictates change hourly.
Verify your destination
dictates prior to departure.
Nobody wants to save for years for a dream vacation
, then spend those precious hours in medical
Especially at several hundred dollars a day.
Up-date your crew inoculations.
Carry your inoc docs.