Good grief do not take this sitting down, fight this injustice all the way. Make sure your workplace is actually safe to return back to and that they observe strict separation protocols. Your doing your best just to get yourself through this dreadful ordeal and then out of the blue they have the audacity and insensitivity to summon you on back. As well as having a legal duty of care under the Health and Safety at Work etc Act 1974 to ensure the safety of employees in the workplace, your business also has a duty to ensure that the way work does not have a negative impact on the safety and health of others. I would advise that you utilize goverment safety warnings as an absolute minimum indicator for your prospective return as they are a little unsure themselves at the moment. As an illness that could make employees or others that your business interacts with sick it's a real risk that needs consideration in terms of how it can be eliminated or controlled within the workplace. Health and safety risks require much assessment (under Regulation 3 of the Management of Health and Safety at Work Regulations 1999) and need to be recorded if the business has more than five employees. Stay safe our kid and fingers crossed for June.