Contact with others’ blood
I am a nurse-midwife and in the course of my profession, I may be exposed to menstrual blood of other women or the blood of childbirth from other women. How does this affect my status of niddah? Or is my status only based upon my own bleeding and not exposure to the blood of others?
Your status is only based on your own bleeding. Contact with other women's blood does not render you a niddah.
However, you should try to make a mental note when your body or garments might get stained or when you sit somewhere that another woman has stained. That can help you determine whether any stain you find on yourself could be attributed to another woman.
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