Does a resource (strategic, luxury, health) have to be "worked" by a city's residents to "count"? I'm pretty sure the answer is "no," if only because of my Civ3 intuitions, but I'm asking only because I'm unfamiliar with health resources. Now that you can "see" the city working a tile it seems almost weird that you can benefit from a cow pasture or gold mine without seeing something happening there.
Without colonies I imagine it's impossible to benefit from something outside your borders, of course...
Without colonies I imagine it's impossible to benefit from something outside your borders, of course...