Covid

So my bf’s mum has been confirmed to have the virus. It is still a while away from when the baby is due. 20th of June. But When would it be suitable for her or anyone in her house hold to come and see the baby? Because me and my bf are arguing, because he is saying she is fine because she done her isolation and the doctors have said it’s okay for her to be out shopping etc. She has the babies car seat at her house and I want to buy a new one now...🤷🏼‍♀️