Your employer has a duty of care, and employers are all advised on how to keep their staff safe in Covid times - masks, social distancing, hand washing/sanitising facilities in the work place, canteen, etc. If these things are not in place, then you need to speak to your union rep or HR department. During lockdown we are all told to work from home unless this is impossible. If it is impossible, then you need to know you are as safe as you can be at work. In order to help yourself, you would do well to get control of your blood sugars and weight. Maybe we can help you with this.