I am my elderly mum's support bubble, she has a view health conditions that make her more vulnerable to coronavirus. I have tried to be really careful about limiting my social interaction with others to try and protect her. I work from home, get shops delivered etc. Today I went to the GP. There was a medical student sitting in who I said I was happy to examine me which I was. The risks seemed low as everyone was wearing masks etc. I happened to mention how good the student was to my sister, who is now furious with me. She says by allowing the student to sit in I have put my elderly mum at more risk than I needed to. Is she right?