Hello CCFC1987 and thanks for your post, 

I am very sorry to learn about your wife and can understand this is a tough time for you both. 

I'm afraid I can't give you a clear cut answer about hugging.  The issue is about the potential risk of passing on an infection to someone who is more vulnerable to infections because of the effects of chemotherapy on their immune system. Unfortunately I am not in a position to be able to quantify this risk for your wife at the moment, but her hospital/medical team should be able to. If they haven't been specific about hugging, do get your wife to ask them and see what they say - it isn't a silly question. If there is a specialist lymphoma nurse involved in your wife's care ask them too. 

If the doctors have already asked you to keep your distance to guard against passing on any infection, then I think all you can do is to follow that advice. But I appreciate it is a heart-breaking situation to be in.  

I am sorry I can't be more helpful, but do talk to someone involved in your wife's care to get some clarity and let them know how much she is struggling just now. 

Wishing you the best, 

Julia