3. Women of childbearing age should be made aware of the risk to an unborn child of occupational exposure to certain microorganisms,eg, rubella风疹 virus.The precise steps taken to protect the fetus will vary, depending on the microorganisms to which the women may be exposed3. Women of childbearing age should be made aware of the risk to an unborn child of occupational exposure to certain microorganisms, e.g. rubella风疹virus. The precise steps taken to protect the fetus will vary, depending on the microorganisms to which the women may be exposed