It's really remarkable how well the USA has done in drastically decreasing the total number of childhood deaths the last 50 years. It's depressing that the remaining statistical noise for a population of ~75 million kids can so dominate the news and public consciousness as if there were net increases in the per population rates.
Infant mortality is pretty good too, yes. But I was using the entire 0-18 year old range of US citizens. And now that we're down to just a trickle of preventable childhood deaths the relative proportion of deaths to drug overdoses and firearms is higher but even those per capita numbers are significantly lower than the ~1960s.