The marketing hype is strong with this one. CRP already exists, is much more accessible and cheaper than this, and is conveniently missing from the "existing methods" section of the article. As are all the other methods that doctors actually use.

The antiobiotic overuse problem has many causes, but a technical inability to distinguish bacterial and viral infections is not one of them. That's been pretty much solved a long time ago

Edit to add: the article is also completely incorrect on what "empirical" antiobiotic treatment is, again in a way that makes the current situation sound much worse than it is