Public health won't be a growth area without massive changes to our healthcare system. Right now Capitalism benefits short-term profit and reactionary responses to disease rather than proactive prevention because there is more more money in charging someone to fix their a leak 100 times just enough so that it can break again, than seeking a long-term solution just as there's more money in giving out antibiotics and charging instead of waiting to see if they're at all necessary gets more money even if from a public health standpoint that's horrendous. As soon as they don't have to be spending a lot on public health, they'll cut it. I can hear it already, "we just had a pandemic what are the odds we have another one soon? Everyone is prepared for it this time around" and bullshit like that. Public health is chronically underfunded and this pandemic exposed that beautifully but I doubt anything will change in the long-run. In the long-run, everyone is dead, so why invest in it?