I'd have him sleep in a spare room maybe for a day or 2 until you sure he is well . I did get extra cautious as I live with 3 teenagers and my husband. I had disinfectant wipes in the loo to wipe down surfaces. Washed my hands a lot. Carried special toilet wipes when out and always had a mini hand antibacterial bottle with me when out. It's just being cautious. I still went to public pools but the outpatients area was my most stressful place. The supermarket was second but I always used the wipes they provided and did the trolly and antibacterialed my hands. I never picked up even a cold in the 6 months despite it running through my household twice.