Cancer. Because when/if I get it (which feels likely considering everyone knows someone who's had it) I'd like to be able to have it cured. Curing hunger won't prevent people in poor countries from getting aids or contracting diseases from doing retarded things. Like eating bushmeat and spreading the Ebola virus around or drinking from water sources where you bring your live stock to go potty. -_- these people usually have a combination of stuff going on.