Not a problem if everyone in the house is vaccinated, right?
If they’ve all been jabbed or boosted in recent months, then you know the air is a sea of little bioweapons.
It's a running joke...vaccination is omicron fertilizer. A twice vaxxed, not boosted gets very symptomatic omicron. A recently boosted party gets slightly less severity. The never injected get minor symptoms. My wife and I are non-injected. Sore throat, fatigue, malaise, slight fever. Most symptoms gone in a week.
The vaxx doesn't prevent contracting, incubating, or transmitting the virus. For some over 60, it temporarily prevents severe enough disease to require hospitalization for alpha -> delta. It doesn't help omicron BA.1. Too early to assess omicron BA.2.
Omicron only needs ACE2 and binds 2.6x more strongly than delta to ACE2. It is quick to attach to the upper respiratory tract. The alpha -> delta required ACE2 and TMPRSS to enter a target cell. That was only found in the lower lung, thus focusing interest on that target. In the end, SARS-CoV-2 is a vascular disease. It attacks the endothelial surfaces inside the blood vessels.
A letter issued by Tony Fauci expressed alarm that the virus also attacks the CD4 cells of the immune system. That is the genesis of the current concerns about HIV testing. The spike on both vaxx and virus has the HIV gp120 insert.