There are some safety issues to take into consideration before booking a treatment with an acupuncturist. Firstly, the insertion of needles could carry communicable diseases, especially those in the blood, unless the needles are properly sterilised after each use. It is for this reason that most acupuncturists around the world have to be registered practitioners. More widely, some people might suffer adverse reactions from an acupuncture session. The very worst cases of malpractice have resulted in fatalities, but it is important to underline just how rare such events are. Extra care should always be taken when an acupuncturist is treating women during pregnancy, and children. In some cases, eye injuries have occurred when needles have been used in close proximity to them.