my husband got first symptom of covid 8 days back and the next day(7 days back) he had 103 fever. he got isolated and 5 days back he got covid tested and the report came to be positive . now it's been already been 8 days from his first symptom so should he come back to room where baby sleeps or he should still isolate.. baby is 3.5 months old. should he be going for another covid test to check negative report??