Without the temple and access to the ritual of the red heifer, we're all tamei (ritually impure) today with no way to fix it. Yet we work to avoid situations that would make us tamei (e.g. kohanim still don't go near most dead, aside from close relatives). Why is this? Can one become "more" tamei with each exposure? Or does it not have anything to do with our state but, rather, is about not developing bad habits that will be hard to break when we do have a third temple?

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    If you are still looking for a good foundation in the different types of Tumah, I recommend from the classics learning the first chapter of Mishna in tractate Keilim (I know this is available with English translation and commentary by R Pinhas Kehati) which is a must, and for a much more thorough and structurally organized set-up, Rambam's introduction to Keilim in his commentary on the Mishna (don't know about English on this one). Rambam was aware that the laws of Sacrifices and Purity are relatively obscure and accordingly wrote very thorough introductions to both those orders of Mishna.
    – Double AA
    Commented Dec 31, 2012 at 5:43

3 Answers 3


See this mp3 by Rabbi Aharon Kahn, summarized by Joel Rich here:

Once a Kohain is ritually impure due to contact with dead, is there any prohibition of further impurity? This makes a difference for med students and pulpit rabbis.

The simple understanding is that for non-Kohens, yes we're all tamei so it makes no difference. You want to live in your own special chamber on Jerusalem bedrock, that's fine; you want to be an undertaker, that's fine too.

For Kohens, the prohibition appears to be (and again there may be other opinions, but appears to be): don't come in contact with the dead in any way that could make you tamei. Even if the Kohen just touched corpse #1, he shouldn't touch corpse #2, as each touch is the kind that could make him tamei.

Even for a Kohen, there's no prohibition whatsoever at becoming tamei via lesser sources, such as dead lizards. A Kohen today can touch as many dead lizards as he likes.

(As the story goes, Professor Saul Lieberman once found a thousand-year-old manuscript from someone claiming a Kohen was prohibited to touch dead lizards too; to which Rabbi Joseph Dov Soloveichik responded:

"so what do you think of Professor Jacob Aegis' work?"


"Aegis?! He's a fool! A nincompoop! He has no business in scholarship!"


So you don't think there were people like that a thousand years ago?

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    "A Kohen today can touch as many dead lizards as he likes" - that's a great quote! And the story just makes it even better...
    – AviD
    Commented Oct 29, 2011 at 16:28
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    See Chizkuni to Emor 21:3 (citing Toras Kohanim perhaps?): "'he shall defile himself to her': and he does not defile himself to others with her: that a man should not say 'since I have defiled myself, let me gather so-and-so's bones by hand', it says 'he shall defile himself to her'".
    – msh210
    Commented Apr 21, 2013 at 14:58
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    Who is Professor Jacob Aegis?
    – Seth J
    Commented Nov 12, 2015 at 22:07
  • I'm pretty sure this answer is just wrong. Who holds that doing an action which would make you Tamei (such as touching Corpse #1) is prohibited if you are currently touching Corpse #2?
    – Double AA
    Commented Dec 16, 2015 at 23:22
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    @DoubleAA, if a kohen is currently touching a corpse and wants to place his other hand on another corpse, I am aware of no one who prohibits this as mosif tumah al tumato. However, if you assume the prohibition is about adding days (as in your answer to this question), once one has touched a corpse in the morning, there is no prohibition to touch additional corpses that same day. Others see this as prohibited. IIRC it is a machloket Rambam & Raavad, but I may be misremembering.
    – Ze'ev
    Commented Jun 1, 2020 at 16:52

An alternative view maintains that really the prohibition is adding levels of tumah, not just performing an act that would make one tamei.

When one touches a dead body he is tamei for at least 7 days. Thus if a kohein would touch a corpse one day, to touch one the next day would be to increase his levels of tumah because he restarts his 7 day count.

Moreover, one who is in contact with a corpse is on a higher level of tumah than one who had touched one. This rule is called "cherev ke-chalal" and is analyzed in the first perek of the Mishnayot in Ahilot. Basically it means while you are touching you become an extension of the corpse such that anything you are touching (for instance, your clothes) become tamei to the first degree, as opposed to second degree, even though they themselves aren't touching the corpse! Thus a kohein who touched a corpse and let go, would be adding to his level of tumah by touching it again.

It is thus very reasonable to argue that a kohein who is currently touching a corpse has no obligation to let go, as he is not raising his tumah level -- it is already risen.

One could discuss whether touching the corpse for a full day is a violation of adding to the 7 days, as above. This is a matter unresolved in the Achronim.

Here is an excellent post on the issue: Kohanim becoming Tamei Nowadays – What’s the Story?


There are many types of unrelated and potentially overlapping Tumah, as well as different degrees of Tumah. Assuming you are talking repeat exposures to the same degree of Tumath Meth:

You can't, and we don't. Kohanim are prohibited from an action that carries a consequence of Tumah, regardless of whether the consequence is in force, which could make it seem otherwise (ie., that you can become more Tamei and we care).

  • There are subtle differences in levels of tumat met. See my answer
    – Double AA
    Commented Jan 5, 2012 at 7:00
  • @DoubleAA That is true, but I believe the question is not about steps/degrees of Tumah but about repeat exposures to sources of Tumah "piling on" and thereby increasing the Tumah that one had since previous exposures to the same source, or another source of the same type/degree, of Tumah.
    – Seth J
    Commented Jan 5, 2012 at 14:30
  • @DoubleAA See my new edits.
    – Seth J
    Commented Jan 5, 2012 at 14:33
  • @SethJ yes, I was asking about repeat exposures "piling on", as you said. It seems binary -- you're tamei or you're not -- yet we're careful to avoid exposure, hence the question. Commented Jan 5, 2012 at 15:03
  • @MonicaCellio But who are "we" in your question?
    – Seth J
    Commented Jan 5, 2012 at 15:41

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