Brady Collins
The use of fetal tissue in vaccine development is a highly debated topic, with several vaccines approved for use in the United States, including those against chickenpox, being developed using fetal cells. The morality of vaccination is often questioned from a religious and ethical standpoint, with the Catholic Church encouraging its members to use alternative vaccines produced without human cell lines. However, the Vatican has clarified that it is morally licit for Catholics to receive vaccines derived from fetal cell lines if no alternative exists and there is a grave health risk. In the case of the chickenpox vaccine, the virus was initially isolated from a three-year-old child and then further propagated in WI-38 cells, a human diploid cell line derived from the lung tissue of an aborted three-month-old female embryo. While the vaccine does not contain fetal cells or tissue, traces of human DNA fragments may remain.
| Characteristics | Values |
|---|---|
| Chickenpox vaccine derived from aborted fetus cells? | There is some truth to the claim that vaccines, such as varicella, do contain cells originating from aborted fetuses, but it's a distant connection. |
| Religious stance | The Catholic Church is opposed to abortion. However, the Vatican has clarified that "all vaccinations recognized as clinically safe and effective can be used in good conscience". The Catholic Church permits the temporary use of vaccines generated using aborted fetal tissue to protect children from preventable diseases until alternative vaccines that do not use aborted fetal tissue are available. |
| Alternative vaccines | An alternative version of the rabies vaccine is available, but that is not the case for the rubella, chickenpox, and hepatitis A vaccines. |
| Religious exemptions | Most states allow for vaccine exemptions based on religious grounds. |
| Fetal tissue in vaccine development | The use of fetal tissue in vaccine development is the practice of researching, developing, and producing vaccines through growing viruses in cultured (laboratory-grown) cells that were originally derived from human fetal tissue. |
| Fetal cells in COVID-19 vaccines | The retinal cells used to make the COVID-19 adenovirus vaccine (J&J/Janssen) were isolated from a terminated fetus in 1985. |
| Fetal cells in Rubella vaccines | One historical cell line used in rubella vaccines was originally obtained from a fetus aborted due to infection with rubella. |
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What You'll Learn
The chickenpox vaccine uses fetal cells
The chickenpox vaccine, like many other vaccines, was developed using fetal cells. The use of fetal tissue in vaccine development involves growing viruses in cultured (laboratory-grown) cells that were originally derived from human fetal tissue. The most important benefit offered by using fetal cells was that they were isolated from the sterile environment of the womb, meaning they were not infected with other viruses, and the vaccine produced in these cells would not inadvertently introduce any other viruses.
The first live attenuated chickenpox vaccine was developed by Dr. Michiaki Takahashi in Japan. The Oka strain of the chickenpox virus was cultivated in guinea pig embryo cultures and tested on children. Scientists then took the attenuated virus previously cultivated in guinea pig embryo cultures and propagated it in WI-38 cells, a human diploid cell line derived from the lung tissue of an aborted three-month-old female embryo.
In the United States, scientists working for Merck isolated and attenuated a different chickenpox virus strain, the KMcC strain, but were unable to produce similar results to those observed after the Oka strain vaccine administration. Merck then licensed Japan's Oka varicella virus strain and further attenuated the strain in MRC-5 cells, which were derived from lung tissue taken from a 14-week-old male aborted fetus.
While the vaccines do not contain any original fetal tissue or cells derived from fetal materials, traces of human DNA fragments remain. The cell lines continue to replicate on their own, and no further sources of fetal cells are needed.
The use of fetal tissue in vaccine development has been a controversial topic, with opposition on religious and moral grounds. The Catholic Church, for example, has generally discouraged the use of vaccines produced with aborted fetal cells, encouraging the use of alternative vaccines if available. However, the Church has also stated that it is morally licit for Catholics to receive such vaccines if no alternative exists and there is a grave health risk.
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Religious views on vaccines derived from fetal cells
The use of fetal tissue in vaccine development has been a contentious issue, with opposition from religious and moral standpoints. The vaccines for chickenpox, rubella, hepatitis A, rabies, and COVID-19 are all made by growing viruses in fetal cells. The cells are derived from abortions, and while the vaccines do not contain fetal tissue or cells, traces of human DNA fragments remain.
The Catholic Church, for instance, is opposed to abortion. However, the Vatican has clarified that it is "morally licit" for Catholics to receive vaccines derived from fetal cell lines, especially when there is a grave health risk. The Pontifical Academy for Life, in 2005, concluded that parents may allow their children to be vaccinated with such vaccines if no alternative exists. In 2017, the same academy reiterated that "clinically recommended vaccinations can be used with a clear conscience," and that their use does not signify cooperation with voluntary abortion. The Catholic Church has encouraged its members to use alternative vaccines, but also acknowledges the common good that vaccination brings, especially to protect the most vulnerable.
Other Christian groups have expressed concerns about the ethics of abortion-derived cell lines in vaccines. Some have called out companies like Pfizer for using fetal cell lines in research and development, claiming that the company is "anti-life" and committed to using fetal cell lines to make a profit. They argue that the use of fetal cells dehumanizes the act of abortion and infanticide.
Despite the religious and moral opposition, some religious leaders from major religions, including Catholicism, have evaluated the use of fetal cells in vaccines and determined that it is not sinful to accept them. The benefit of using fetal cells is that they are isolated from the sterile environment of the womb, ensuring that the vaccine does not introduce other viruses.
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Fetal cells are sourced from aborted fetuses
The use of fetal tissue in vaccine development involves growing viruses in cultured (laboratory-grown) cells originally derived from human fetal tissue. The practice has faced opposition on religious and moral grounds, particularly from the Catholic Church, which has encouraged the use of alternative vaccines produced without human cell lines.
In the case of the chickenpox vaccine, specifically, the Oka strain of the virus was cultivated in guinea pig embryo cultures before being further developed by propagating it in WI-38 cells, a human diploid cell line derived from the lung tissue of an aborted three-month-old female embryo. Additionally, the MRC-5 cell line, derived from lung tissue taken from a 14-week-old male aborted fetus, was used in the development of the Merck chickenpox vaccine.
The rationale behind using fetal cells is that they offer a "clean" source of cells. Fetal cells are isolated from the sterile environment of the womb, reducing the risk of other viruses contaminating the vaccine. This isolation ensures that the resulting vaccine does not inadvertently introduce any other viruses.
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Fetal cells are used to grow viruses in a lab
The process of using fetal cells to grow viruses involves creating single-cell suspensions, meaning the cells can no longer be grouped together in the form of tissues or organs. This step ensures that vaccines do not contain "parts of fetuses". Once the vaccine viruses have grown in the fetal cells, they are purified to remove cellular debris and growth reagents. This purification process is crucial to ensure that the final vaccine product contains only the desired viruses and no unwanted cellular material.
The use of fetal cells in vaccine development has been a subject of ethical debate. Some people oppose the practice on religious and moral grounds, arguing that it is connected to abortion. The Catholic Church, for example, has generally discouraged the use of vaccines produced with cell lines from aborted fetuses. However, in certain cases, such as grave health risks or the absence of alternative vaccines, the Church has permitted the temporary use of such vaccines.
The specific case of the chickenpox vaccine and its connection to aborted fetuses can be traced to the development of the Oka strain of the virus by Dr. Michiaki Takahashi in Japan. This strain was then propagated in WI-38 cells, a human diploid cell line derived from the lung tissue of an aborted three-month female embryo. In the United States, Merck further developed the Oka strain by attenuating it in MRC-5 cells, which were derived from lung tissue taken from a 14-week-old male aborted fetus. This vaccine, known as Varivax, received FDA approval and is currently used in the United States.
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Fetal cells are purified and do not contain fetal tissue or DNA
Fetal cells have been used in the manufacture of vaccines since the 1930s. They are used to grow viruses for vaccines because they were isolated from the sterile environment of the womb, meaning they are not infected with other viruses.
However, the vaccines do not contain fetal tissue or cells. Once the vaccine viruses are grown in the fetal cells, they are purified to remove cellular debris and growth reagents. This is an important step in the manufacturing process, as it ensures that only the virus itself and stabilizing agents remain in the final vaccine.
While the vaccines do not contain fetal cells or tissue, traces of human DNA fragments may remain even after purification. However, this does not pose a health risk. The idea that fragmented DNA in a vaccine could cause genetic harm is false.
Some religious groups have opposed the use of fetal cells in vaccines on moral and religious grounds. The Catholic Church, for example, has encouraged its members to use alternative vaccines produced without human cell lines if possible. However, the Vatican has clarified that it is "morally licit" for Catholics to receive vaccines derived from fetal cell lines if there is a grave health risk and no alternative exists.
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Frequently asked questions
The Oka strain of the varicella (chickenpox) virus was cultivated in guinea pig embryo cultures and tested on a small number of children. Scientists then further developed the vaccine by taking the attenuated virus and propagating it in WI-38 cells, a human diploid cell line derived from the lung tissue of an aborted three-month-old female embryo.
The morality of vaccination depends on the duty to protect one's health and pursue the common good. The Catholic Church is opposed to abortion, but the Vatican has clarified that it is "morally licit" for Catholics to receive vaccines derived from fetal cell lines.
The Catholic Church encourages its members to use alternative vaccines produced without human cell lines if possible. The National Catholic Bioethics Center has stated that "one is morally free to use the vaccine regardless of its historical association with abortion."
Vaccines do not contain fetal cells or parts of fetuses. Once the vaccine viruses are grown in the cells, they are purified to remove cellular debris and growth reagents.
Vaccines for rubella, shingles, adenovirus, hepatitis A, and some COVID-19 vaccines were also derived from fetal cells.
