I think this overstates what this single study can say about the effects of a vegetarian diet. The NHS did create a page about that study due to the media attention it got, and they conclude:

> Despite the media headlines, the results from this Austrian cross sectional survey provide no proof that vegetarians are in poorer health than meat eaters.

https://web.archive.org/web/20200427104728/https://www.nhs.u...