I would say a couple of things.
The first is to just validate that this is something that anybody in that situation is going to be experiencing and not to blame themselves. There's a simple kind of five-letter formula: listen, inquire, validate, explain and support. I think that if those of us who are health providers can just follow that very simple kind of acronym, it can be helpful.
I think peer-to-peer support can also be helpful for people, whether it be through groups or one-to-one facilitated peer support where they can connect with each other. It can be very helpful.
I think the last is just to acknowledge that this is just an unimaginable and horrific experience that we've been through, and that just the opportunities to talk about what it's like rather than to lock it away or try to put it into the past is the way we move through it, using all available supports and involving all family members, including younger children as well, who have a different perspective but have been affected.