If you do a search for "Irritable Bowel Syndrome" & then sort by date 3 of the top 4 choices are: "Manuka Honey Capsules Announced", "New Supplement [RezVera] Shows Great Promise for Gastritis", "CSIRO cereal a real superfood". Spammy McSpam Spam.
Sometimes press releases blur the lines between advertising & news, I get that, but these sites aren't really that useful & look almost like they're gaming Google News to advertise. Rarely do they actually have any authoritative links backing up their claims, which is something Google supposedly wants from sites joining Google News.
Generic Google News talking points are:
You need at least 3 or more editors/staff, with some sort of bio page detailing who they are.
You need to push a lot of content through your site. What "a lot" is, no one really knows.
Content needs to meet a certain quality level. What the criteria are for "quality content" is anyone's guess. If you're big enough you won't be held to this as strictly.
Content should offer an independent viewpoint and not be slanted to one side or another. If you're big enough you aren't held as strictly to this.