I'm struggling to remember my references, but I do recall reading something about people's experiences during the Blitz, and quite a lot of the emotional fallout emerged once the immediate danger was over, and people struggled to return to a normal life having experienced often quite traumatic events.
The degree of trauma from Covid is likely to generally a lot less than having aircraft dropping bombs on your house, but there will undoubtedly be significant levels of distress amongst quite a few people. Just as we all start breathing a sigh of relief, it's worth remembering that - psychologically and emotionally - the country is not going to be out of the woods for some time yet.