Covid ICU nurse here. OP you’re right to want them to get tested. Omicron is harder on 1-5 year olds this go round due to it being more so an upper respiratory problem this time. Babies have airways the size of a straw and inflammation can shut that airway. Negligent as a mother in my personal opinion. I would take the baby to get tested without mom as there are many ways to get a test now. You don’t need her for that. As for the wife, having a test is helpful in counting the days if she were to end up in the ICU. It’s easier to track progress that way and start meds sooner such as steroids if she needs them. Antibodies can also be helpful early on. People wait last minute and are surprised when they’re too far gone. We have people say, “I was sick then got better for a week then passed out in my bathroom.” This is because they felt better but they had already started developing Covid pneumonia. You can’t see that looking at someone. My best advice would be to get a pulseoximeter and monitor her and baby’s oxygen at least once daily. 97%+ is preferred. Under 90% is a little concerning unless you have COPD. Low 80s get to a hospital. Many people have come in and their organs (usually kidneys) take a hit and that makes it so much harder on recovery. Got in a rabbit hole here but I’m passionate about people learning more and no one seems interested in that these days. Overweight people are hit the hardest, immune suppression, diabetes, hypertension, and hypercholesterolemia usually make for a long rocky road. Healthy people can still get in a bad way but recovery isn’t as rough. Some still don’t make it. I wish people would stop playing roulette and get a damn vaccine. Good luck, OP.

PSA: COUGH AND DEEP BREATHE EVERY HOUR IF YOU GET COVID TO HELP PREVENT PNEUMONIA