My son got the results of his pcr test back and it's positive. He caught what he thinks is omicron on Dec 27th when he used a rapid test. He was infected by his brother-in-law on Christmas Day. My son is fully vaccinated and has had a booster shot. His brother-in-law is fully vaccinated but didn't get boosted. Brother-in-law's pcr came back negative. My son has ordered another pcr and will use it in a few days.
My daughter-in-law, son's wife, still has congestion. She used a rapid test and it was still positive so she's holding off on doing another test until she feels better. She also has MS. I don't know if that has anything to do with it, but thought I'd put it here.
The other person is the 81 year old grandfather who's still testing positive, but is not sick and never seemed to be. He is also fully vaccinated and boosted. The four others didn't catch it and have tested negative. They, too, are fully vaxxed and boosted.
All eight of them were together for Christmas.