Pikuach nefesh

Pikuach nefesh, or Piyquaḥ Nefesh (פיקוח נפש, "saving of human life") is the principle in Jewish law that the preservation of human life overrides virtually any other religious consideration. When the life of a specific person is in danger, almost any negative commandment of the Torah becomes inapplicable.

Biblical source
The Bible in Leviticus 18:5 states "אֲשֶׁר יַעֲשֶׂה אֹתָם הָאָדָם וָחַי בָּהֶם" literally translated as "that do them the person and live with them". Ezekiel 20:11 also states this phrase. Nehemiah 9:29 also mentions this phrase.

Talmudic discussion
The Talmud discusses a number of cases as examples in which biblically mandated laws can be disregarded for the sake of saving a human life. All of these examples relate to Shabbat prohibitions: rescuing a child from the sea, breaking apart a wall that has collapsed on a child, breaking down a door about to close on an infant, and extinguishing a fire to save a life. The Mishna there discusses when one is permitted to break his or her fast on Yom Kippur: "If one is seized by a ravenous hunger (ostensibly referring to something life threatening), he may be given to eat even unclean things until his eyes are lightened."

Drawing the line
Pikuach nefesh has limitations. The individual whose life is to be saved must be a specific, identifiable individual, rather than an abstract or potential beneficiary.

The laws of pikuach nefesh apply equally in saving the lives of a Jew or a Gentile, since a Gentile is just as much God's creation as a Jew. If one must choose between saving a Jew or a Gentile, and can only save one, the one who is more likely to survive given the circumstances must be saved.

Pikuach nefesh does not apply when an animal's life is in danger, and halakha may not be broken to save the life of an animal.

Another question is what constitutes a life-threatening situation. Some situations are clearly life-threatening, such as one who is dying of a disease and will die without medical intervention, or one who is drowning and will not be able to escape the water without help from another. But in other situations, it may be unclear if a life is truly in danger.

For example, if a person is feeling "extreme pain," this may be tremendously uncomfortable, but will surely not be fatal, the actions one may take in violation of religious law are limited. It is preferable in these situations to receive help from a Gentile in any manner possible.

If one is in danger of losing a limb, mobility, eyesight, suffering the loss of some other function vital to one's future survival, or may be in danger of a new health problem developing that may ultimately shorten one's life, the situation is considered to be life-threatening.

Uncertainty
If it cannot be ascertained whether or not a situation is life-threatening, the situation must be considered life-threatening until proven otherwise, thereby allowing action to be taken.

It is of prime importance that if one believes a life may be in danger, and seconds may count, that persons involved not delay helping the victim out of fear of violating halakha, or in order to determine if such a violation is permissible according to halakha.

If one takes action in violation of halakha to save a life when s/he believes the situation is life-threatening, but later learns that there was no threat to a human life, s/he has not sinned, and must not feel guilty over having made such a mistake.

Who must help
In a life-threatening situation, when possible, it is necessary that the most qualified individuals available provide all assistance necessary during every moment of the situation. But when seconds count, there must be no delay in determining who is more qualified.

If there is a choice between a Jew and a Gentile who are equally qualified, and there is clearly plenty of time to decide, it is preferable that the Gentile provide the assistance. But if there is a choice between two Jews, and there is clearly plenty of time to decide, it is preferable that the more observant of the Jews break the halakha. This shows the importance of breaking halakha when a life is on the line, and that less observant Jews are not permitted to serve the purpose of breaking halakha during non-emergencies.

Organ donation
According to some halakhic rulers, organ donation under Jewish law is one classic example of the obligation to violate a commandment because of Pikuach nefesh. Saving one's life can override the prohibition against desecrating a corpse. However, due to the limitation that a specific life must be in danger, a specific organ recipient must generally be identified before the organ is removed. Organ removal to organ banks for possible future use is generally prohibited by all Orthodox Judaism halakhic decisors.

Shabbat and holidays
The laws of Shabbat and the Jewish holidays may be suspended for the purposes of pikuach nefesh. The earliest known example of this took place in 167 BCE, when Mattathias and the Hasmoneans declared that it was permitted for their followers to fight on the Sabbath day to defend themselves from attack. One is allowed to travel in order to save another’s life, and medical care may be provided to critically ill patients (see Driving on Shabbat). According to Moshe Feinstein, it is permissible to travel to accompany a woman in labor to a hospital because the Talmud is especially solicitous of health with respect to pregnancy and childbirth. Shabbat laws can also be bent for a woman who has given birth in the last three days to make sure that she is comfortable and healthy.

One is allowed to drive a woman to a hospital on Shabbat to give birth, since birth can be life-threatening without medical supervision. Similarly, one may sign a consent form for surgery on Shabbat if the surgery will otherwise be delayed.

If one's close relative is transported to the hospital under emergency circumstances during Shabbat, one is allowed to drive or accept a ride to the hospital in order to provide company to their relative at the hospital, since this may be life-saving. One may also be needed at the hospital to sign potentially life-saving consent forms.

Telephone
If a medical emergency is known or suspected that warrants placing a phone call rather than transportation in a motor vehicle, the telephone may be used. If the situation has a lower level of urgency, the receiver shall be removed and the buttons pressed in an unusual manner. If the person involved is expecting a call to be returned to deal with the issue, answering the phone is permitted, and if another uninvolved person has placed the call, the person involved shall state that they are waiting for a call from the doctor (or similar).

Work
It is permissible for one whose profession it is to save lives (such as a physician, nurse, or emergency medical technician) to work on Shabbat in order to save lives. It is permissible even for such a professional to use a telephone or pager to be alerted to his/her need for a life-saving act or to communicate life saving information, or to travel by any means necessary to the location where the potentially life-saving act will be performed.

It is another question if one who is facing hard economic times is permitted to work on Shabbat in order to make enough money to avoid starvation or homelessness or that of his/her relatives. This question may apply whether one needs the extra income that would be earned from working on Shabbat in addition to all other days, or if one must work on Shabbat in order to avoid losing his/her job/business. In such situations, the person involved must first search for all alternatives possible to working on Shabbat, and a rabbi shall be consulted regarding one's individual circumstances.

Fire
Extinguishing a fire on Shabbat or Yom Tov is forbidden under Jewish law. Extinguishing a fire or using the phone to call the fire department only in order to save one's property from damage is forbidden. However, it is still permissible do to so in most cases due to the danger caused to others unknown to the person who discovers the fire. Even if all people can escape a building, as long as the fire burns, there is a danger it can spread to other nearby buildings, thereby endangering the lives of others in them. Even in a rural area, where there are no other buildings nearby, there is the danger the fire can spread to a nearby forest, started a more devastating forest fire, which may endanger others. Only if it can clearly be established that no such risks are present is it forbidden to break Shabbat.

Non-kosher food
Non-kosher food may be eaten under the following circumstances:
 * If no kosher food is available to the person, and failure to eat the non-kosher food may result in starvation.
 * If a non-kosher food product specifically is needed to cure an illness.

If necessary for recovery, a patient may eat non-kosher foods. In the Babylonian Talmud, Chapter 82a of Tractate Yoma mentions pregnancy cravings for non-kosher food (the passage discusses a pregnant woman who craves pork on Yom Kippur) as the paradigmatic example of a presumed life-threatening situation where a person is allowed to eat non-kosher food (and is permitted to eat it on Yom Kippur).

Fasting
On Yom Kippur, the fast preferably may only be broken if one is advised by a physician not to fast, and then consults a rabbi regarding the physician's advice. The general practice though, is to eat only as much as is necessary in order to satisfy one's needs. If one is advised by a physician not to fast, but is unable to consult a rabbi, s/he should eat in accordance with the physician's advice.

If one senses s/he may have a health problem that may be aggravated by fasting, but no physicians or rabbis are available to give advice, s/he should use his/her own judgment, and is permitted to refrain from fasting. In such cases, s/he must not delay eating in order to speak with the appropriate authority, or feel guilty for eating in this situation.

One who must eat on Yom Kippur is required to give eating necessary to avoid aggravating a medical condition priority over prayer. All blessings normally recited before and after eating are recited as usual.

Fasts other than Yom Kippur are viewed more leniently. Anyone who feels unable to fast is permitted to break the fast without attempting to consult a physician or rabbi.

On all fasts, one who is taking a medication for any reason is permitted to use food or water as necessary to aid in taking the medication. If the medication has instructions to consume food or beverage with the medication, s/he is not permitted to fast, and s/he need not further consult a physician or rabbi.

A person who becomes severely dehydrated during any fast shall consume sufficient fluids to restore his/her body to normal hydration levels.

Waiting for the proper time to eat
Rabbinical law prohibits eating at certain times even on non-fast days, such as prior to daily morning prayer, the recitation of kiddush on Shabbat or Yom Tov, and between the ending of Shabbat and Havdallah. In particular, these laws are to strictly be followed by adult males and should be followed by adult females who are not pregnant or nursing. While it is optimal to wait out these shorter periods of time rather than eating, even for one whose medical condition demands frequent eating, there are exceptions:
 * A pregnant woman or a woman who is nursing a baby who has a craving shall eat without delay. For all other women and for boys yet to have reached bar mitzvah age, these laws are treated more leniently.
 * One who must take a medicine at a specific time may consume any food or drink necessary in order to consume the medicine or that must be eaten with the medicine.
 * A person who is severely dehydrated may consume fluids as necessary to restore his/her body to normal hydration levels.
 * A person who lacks the strength to perform the necessary service without nourishment may eat the minimum amount necessary to perform the service with kavannah.

Exceptions
There are some Jewish laws that may not be violated, even when a life is in danger. In these cases, a life must be sacrificed rather than a halakha be broken. These include:

Defaming God's Name
Sins that involve Chillul Hashem (the defamation of God's name) may not be committed even to save one's life. These include idolatry, blasphemy, or denial of God's existence. Forbidden violations include:
 * Worship of any god other than Hashem
 * Bowing to any god other than Hashem for show just to please the enemy, or other signs of pretending to worship such a god, even if one's intention is not to worship
 * Violating any negative commandment in submission to a persecuting enemy whose purpose is to stand against God
 * Construction of such a god for oneself or others to worship, or support of such worship
 * Entry into a building where a god other than Hashem is being worshipped. It is for this reason that one may not enter a church during services, even to save a life. Entering a church when services are not going on has lesser restrictions.
 * Recitation or printing God's Holy Name in vain
 * Destruction of God's Holy Name from a printed sheet of paper or parchment except in the performance of rituals prescribed in the Torah
 * Pretending God does not exist in order to avoid persecution

Murder
Any act that intentionally causes the death of another person (considered to be an act of murder), that injures a person so the potential for death from the injuries is high, or that otherwise creates a dangerous situation that will very likely put one or more lives at risk, is not permitted for the preservation of life. Forbidden examples are:
 * Harvesting organs from the body of a person who is clearly alive
 * Live organ donation, where the risk of death to the donor is extremely high. If the risk is low, the donation is permitted.
 * Driving at a very high speed in order to reach a hospital if a crash with an innocent motorist is almost assured

Exceptions
An exception in which killing another person is permitted is the case of a rodef (aggressor), who may be killed in order to save the life of oneself or another. This permits self-defense and wartime killings in Judaism. Also, abortion is permitted in Jewish law if the unborn fetus is endangering the mother's life, because the fetus is considered to be a rodef. The "rodef" assertion is also used to permit the separation of conjoined twins when it is likely or even certain that one will die as a result if the operation if this is necessary to save the other.

Biblically-sanctioned executions may be performed, though they are not performed today.

Life for a life
While one is not permitted to automatically give up one's life in order to save the life of another (an act of suicide, forbidden in Jewish law), one may risk his/her life to save the life of another. It is, however, forbidden to place one's own life at more risk than the other person is already in.

One may not put another's life in danger, especially against that person's will, in order to save his/her own life or that of another.

Scholars have long questioned whether or not stealing is permitted in order to save a life. Most have concluded that stealing sustenance from a poor person is prohibited under life-threatening circumstances, since the life of a poor person who loses even a small portion of his/her sustenance is considered to be endangered. Also, operating a business or similar operation that intentionally robs or defrauds the poor of all or any part of their sustenance is strictly forbidden, even to save a life. Robbing or defrauding a large business, organization, or the government is forbidden if the poor will suffer as a result of the business, organization, or government losing these funds. If a business suffers the loss of money due to fraud or theft, it may pass the losses onto customers by raising its prices, and as a result, the poor may have to spend more. The government, if cheated, may raise taxes, even to the poor, or cut services from which the poor benefit.

Lashon hara is symbolically considered an act of murder, and therefore may not be spoken to save a life. However, most cases in which bad word must be spoken against a person in order to save a life are productive, and thereby do not constitute lashon hara.

Torturing or persecuting another person is forbidden, since a person who has undergone such trauma has been "murdered" for whom s/he is. An exception is one who is seemingly tortured by medical treatment performed to save his/her life.

Forbidden relationships
Engaging in individual sex acts or entering long-term relationships forbidden according to the Torah are not permitted if failure to do so would place one's life on the line. This includes adultery, incest (acts with one's blood relatives mentioned in the Torah as constituting a forbidden relationship), sexual relationship between a Jew and a gentile, male sodomy, or marriage between a kohein and a woman forbidden to a kohein.

Forbidden sex acts that are only rabbinically prohibited are permitted in order to save a life. Also forbidden forms of sex with one's spouse, such as niddah violations, are also permitted in order to save a life.

Other behaviors that directly lead to a violation of a prohibited sex act are also forbidden in order to save a life. For example, violations of yichud laws prohibiting long-term seclusion with a member of the opposite sex would be forbidden. It is therefore forbidden to live with a member of the opposite sex forbidden under yichud laws if the alternative is life-threatening homelessness.

Rape
If one is raped by physical force, one is not considered to have transgressed, since the victim has no control over the act. Even if the victim is capable of fighting back but fails even to attempt to do so, no violation has occurred. But scholars have questioned if one who is threatened with a weapon to submit to a forbidden sex act is required to give up his/her life rather than submitting. Most scholars have concluded that due to the trauma one is experiencing during such an event, the act is considered involuntary, and even if s/he submits to the act, s/he is forgiven.

Contemporary examples
A ZAKA delegation, a rescue team made up of ultra-orthodox Jewish men worked in the Haitian capital of Port au-Prince soon after the 2010 Haiti earthquake. They took time out to recite Shabbat prayers and continued to work throughout Shabbat.