Dr. Hilary: What does self-isolation mean?
Good Morning Britain presenter Susanna Reid announced that she is self-isolating for 14 days after a member of her family showed cold and flu-like symptoms.
Although not showing symptoms herself she has taken the precaution in line with the government's advice that anyone showing symptoms , or in a household with someone who shows symptoms, should self-isolate.
But beyond not going to packed concerts, what does self-isolating actually involve?
GMB's Dr Hilary Jones says the public have to be stringent about restricting their contact with anyone, in their own houses and outside.
He said: "For seven days you close the front door. You don’t go out in public. You don’t even go for a walk in public.
"You don’t go to the shops. You have deliveries taken to your door. The door is closed, the deliveries are left on the front doorstep.
"When the delivery man is gone, then you bring the things in. So you don’t have contact with delivery guys, who maybe have come into contact with 50 other people doing deliveries.
"You don’t go out in public. You don’t take public transport, not even taxis.
"You use your own room. Open the window by all means but you close the door and you have your meals in that room and you distance yourself from other people as much as possible in the same household.
"Then you need to make sure you use your own crockery, cutlery, cups and glasses. You thoroughly wash them afterwards in hot water and soap or in the dishwasher.
"You use your own towels and your own bathroom utensils. You use the bathroom after everybody else has used it. You use it last and then you wash all surfaces down thoroughly with something like bleach, or any cleaning products containing bleach and chlorine products.
"If you do this you’re reducing the risk. There’s not no risk but you’re reducing the risk."