You could look at that and say "It seems to be a problem that's being solved so I should do something else" or you could say "Wow, interventions in this area have been really effective so this must be a good use of my charity dollars!" There are different problems where one or the other of these views are actually correct based on the marginal utility of an extra dollar directed towards a problem and you really need careful research to distinguish them. More than you can do yourself, so look at places like Givewell[1] or 80,000 Hours[2].

[1] https://www.givewell.org/

[2] https://80000hours.org/

If you want to help get it to zero there's a UN program: https://wfp.org