Hey man first and foremost - best of luck and mojo toward your mom ok.The same "syntax" was in the tread Dan posted about "I finally got it", that Dan himself would have authored. That's what seems "off". He was typically of well-spoken verbiage. And, I'm sure he's fully vaccinated and boosted. I would think it would be an unwritten rule in his line of work.
FWIW, I just found out my mother tested positive this AM! She's 83. Fuck me runnin'.
But I could see him typing that way under his circumstances and/or his wife possibly posting on his behalf. I guess time will tell, but I doubt he would create a 'joke' such as this. The negative test is kind of weird though.