I really don't know - but I would imagine the armed forces are keen to continue 'business as usual' as visibly as possible in order to maintain their deterrence. I could be wrong, but I hope not!
Could be todo with a video put out by the 100ARW Command Team/48FW on Face book that an active duty member of the 48FW and a dependant from the 100ARW have tested positve for C-19 so no visitors ??