Health care professionals will tend to be vaccinated against flu, so they are less likely to get it, so you'd be looking at a very small population which is why

Health care professionals will tend to be vaccinated against flu, so they are less likely to get it, so you'd be looking at a very small population which is why you don't see more deaths. If we widen this slightly to healthy but unvaccinated 29 year olds we do start to see deaths from flu.