No, it's not. Actually, no matter how much the media repeat warnings about these issues, PEOPLE (a part of them) is oblivious to these public health issues. I dare you to watch CNN or read MSN, HuffPo or any news aggregator a day without something being said about at least one of these issues, mostly (in US) obesity. We even had a mayor on NYC that went into a series of highly controversial steps to prevent obesity (limiting size of sodas, really? Coach potatoes would buy 2 of them). it's just that some people doesn't pay attention because they don't want to change their lifestyle.
Ebola is something "new", so gets more flash from news outlets since people will cringe for, well, news. It's the way people work, unfortunately. In a BTVS season, the much bigger issues above would be the Big Bad. Ebola is just the monster of the week. Granted, it gets full attention now, but once current crisis is gone, I doubt you'll hear about it until another outbreak.