If there is nothing else between you and the lamp than just a wire mesh, in principal the harmful UV is reaching you.
But if it is dangerous? That depend on the UV power leaking out. So if it is only just one tiny gap, there would be no problem, as there is just not sufficient power to cause any real harm. (on the quantitative grounds). Even normal general lighting lamps do pass the UV out, but it is the very limited power in the UV (health officials set limits for that and all lamps have to comply, or they have to be properly labeled as to operate with the appropriate UV filter glass only; the complete fixtures have to meet the related limits with specified lamps as well), what makes them safe.
But if the mesh let 30..50% of the UV, it become very dangerous.