That's a good question.
I think the safest response is that we do not know. That's why this conversation becomes very important, because we simply do not know.
It also has to do with the heightened stigma about seeking help—keeping everything to oneself and this perception of being weak if we come forward. There are limited interventions, of course, with the isolation and everything going on, and the stigma and self-stigma make it even more difficult to come forward. It could be that by the time someone is reaching out for help they are at the burnout level.
If we encourage early intervention, awareness and prevention, it can very much further our understanding and provide some respectful response to that important question.