My husband is working from home today as the office where he works are being deep cleaned. There was a confirmed corona virus case on the third floor. He works on ground floor. Do you only have to isolate if you get symptoms now? Or should we be isolating as he may have been in contact with some one? The offices have 800 or so people in ( big block) and he doesn’t know who has it as the company can’t release that info. Should he be isolating or not officially?