I’ve never heard of guns spoken of as a public health issue by public health experts, as opposed to politicians. This is among a fairly uniformly left-leaning bunch of people. The worse maternal outcomes for black women is something I’ve heard discussed, because maternal health is a central focus of public health (it happens to be my dad’s area of expertise). Maternal mortality for black mothers is a problem everywhere in the world. Most developed countries don’t have enough black people to have rigorous data on this. Some that do, like France, don’t track these statistics by race as a matter of formal policy. But the UK has about the same maternal mortality rate for black women, (40 per 100k) as the US (37 per 100k). The gap between black and white is actually bigger in the UK (5x) than the US (3x). Nobody does a good job with maternal care for black women, and nobody really knows what the problem is.

By the way, I have no public health expertise myself; just recounting as a lay person what I’ve heard public health experts talk about as a proxy for the metes and bounds of the field.