by Noel Jackson
figures by Daniel Utter

Have you ever wondered how scientists study human tissue in the lab? They do so with the help of authentic human cells. Normal cells in the human body have a finite number of replications, which limits their lifespan. Immortal cancer cells escape this limit and replicate indefinitely, making them ideal for research that requires a constant supply of quickly growing cells. Today, thousands of distinct proliferative human cell cultures called “cell lines” are used as biospecimens in medical research. The discovery of naturally occurring immortal cells occurred 70 years ago with the identification of a cell line called HeLa. The HeLa cell line still lives today and is serving as a tool to uncover crucial information about the novel coronavirus.

HeLa cells were the first human cells to survive and thrive outside the body in a test tube. Ever since then, HeLa cell lines have been used in more than 100,000 scientific PubMed publications on a range of topics including cancer, cell biology, genetics, and infectious diseases. Plus, studies in this cell line have led to pioneering discoveries that have merited three Nobel prizes to date!

But where do these cells come from? As it turns out, they originate from the uterus of a 31-year-old African American mother who was diagnosed with an unusually aggressive form of cervical cancer in 1951. The young woman’s name was Henrietta Lacks.

Henrietta Lacks and her special cells

Henrietta Lacks grew up with extended relatives in a poor community in Clover, Virginia. As a child, she worked on the family farm growing tobacco. Ten years after moving to Baltimore, Maryland with her husband and children, she entrusted Dr. Howard Jones at Johns Hopkins Hospital to treat the pain she began to experience in her abdomen. Dr. Jones diagnosed her with cervical cancer. While Lacks succumbed to the cancer a few months later, an extension of her lives on as a crucial tool in science. Her immortal cells remain circulating among scientists in laboratories all over the world today.

Without her knowledge or permission, pieces of the tumor from her cervix were taken and given to Dr. George Otto Gey for cancer research. Like many other scientists, Dr. Gey was working to model human cancer in a test tube to develop therapeutics against the disease. While many cancer cells grow and replicate uncontrollably, those that grew as such outside the body were not known until Henrietta Lacks’s cells were discovered. Cells from her tumor grew indefinitely in flasks in Dr. Gey’s lab. The HeLa cell line, coined after the letters of her first and last names, was born.

HeLa cells revolutionized biomedical research

After their discovery, scientists were able to directly perform tests on human tissue outside the body for the first time. The excitement about HeLa cells crossed industrial and geographical boundaries (Figure 1). They were sent to space during the Space Race to uncover the impact of zero gravity on human cells. They were studied to determine the effects of radiation after nuclear bomb explosions.  They were even used by the beauty industry to test potential side-effects of new cosmetic products. The cells were used by biomedical researchers all over the world to study genetic mutations as cells divide, discover potential cancer therapeutics, and develop treatments for infectious diseases.

Figure 1: The impact of HeLa cells on biomedical research. HeLa cells represented scientists’ first opportunity to do long-term studies of human tissue outside of the human body. Many scientific and science-adjacent fields took advantage of these cells to study a variety of things, from disease prevention to Space physiology.

HeLa cells and virus research: then and now

HeLa cells were first used to study the growth and spread of poliomyelitis virus, the pathogen that causes polio. This research eventually led scientists to develop a vaccine for polio in the U.S. All children born in the U.S. now receive four doses of the inactivated poliovirus (IPV) vaccine to prepare their immune system to fend off polio infections. Now, the worldwide incidence of wild polio has dropped 99% and is completely eradicated in the Americas, Europe, South East Asia, the Western Pacific, and, most recently, Africa. The Center for Disease Control (CDC) projected that, in the absence of a vaccine, more than 17 million people would have been infected and paralyzed by the virus. Without HeLa cells, this projection may have become a globally morbid reality.

When initially discovered, HeLa cells were the human cell line of choice to study the viral pathogenesis of polio. Now, they are paving the way for COVID-19 research breakthroughs. The groundbreaking study that identified the infectivity of the virus SARS-CoV-2 in humans did so using the cells that were isolated from Henrietta Lacks. Scientists began studying COVID-19 using HeLa cells, but soon found that the virus did not infect these cells well. This curiosity led the researchers to search for the key to viral entry that was apparently missing on the HeLa cells. Other forms of the coronavirus used a molecule, called ACE2, to enter the cells. ACE2 particles surround the surface of some human cells. Maybe the novel coronavirus also enters cells through the same molecule. After engineering HeLa cells to display the ACE2 molecule, the authors observed that the novel coronavirus could then enter and infect the cells (Figure 2). ACE2 acts as an entryway for any SARS-CoV-2019 particles to recognize and bind. After entry, it can use the cell’s machinery to replicate and spread, causing the novel coronavirus disease – COVID-19. Using HeLa cells, then, the researchers discovered an important aspect of SARS-CoV-2 infectivity and thus of viral spread.

Figure 2: ACE2 receptors decorate the surface of HeLa cells to promote infection. HeLa cells do not naturally display high levels of ACE2 proteins on their surface, preventing efficient infection by SARS-CoV-2 particles. However, when researchers engineer HeLa cells to display the ACE2 protein, the viral particles gain entry into the cells and begin their cycle of infection.

Another study used HeLa cells as a tool to uncover the machinery required and process used for invasion of human cells. Researchers have also investigated the stability of the virus’s genomic material in HeLa cells by comparing its genomic material with that of many other viruses. The use of HeLa cells in COVID-19 research has provided insights on the molecular mechanics of SARS-CoV-2019 and the components required for infection. These data are pieces of information that come together to build a greater understanding of the virus, which is essential for developing future treatment.

A lasting contribution to the world

When Henrietta Lacks and her cells alerted the world to the existence of immortal human cells, opportunities arose for research and medical treatment development. Today, her cells continue to serve academic and industrial institutions. So much so that she has been described as the Mother of Modern Medicine in a painting by artist Kadir Nelson in 2017. The use of HeLa cells in COVID-19 research is a testament to Henrietta Lacks’s lasting contribution to provide microscopic tools for scientific discoveries that billions have benefitted from thus far and will benefit from in the future to come.

Noel Jackson is a second-year Ph.D. student in the Biological and Biomedical Sciences Program.

Daniel Utter is a 6th year Ph.D. student in Organismic and Evolutionary Biology at Harvard.

For more information:

  • Stay up-to-date on the use of HeLa cells in biomedical research by visiting here
  • Check out original research publications that use HeLa cells for COVID-19 discoveries here and here


  • The Henrietta Lacks Family Foundation

60 thoughts on “Vessels for Collective Progress: the use of HeLa cells in COVID-19 research

  1. 💜🙏🏾 I just got through watching the Press Conference I can’t wait to follow the process just know I’m here with my support from a far. Continued prayers for your family and extended family.

  2. I think the Lacks family should have medical coverage for life. The least our country can do for this family. Damn zarcaria had to enter research studies to buy himself glasses. Her daughter Elsi died shortly after in a mental institution for blacks. She was sick with syphillis not insane all because blacks did not get treatment. Ok so there were no hippa laws but come on now. We are still using her cells today …most recent covid vaccine. This is appalling. How are we different from nazi germany.

  3. I wonder if she even had cancer or if what they wanted was her immortal cells.

    They used them to infect them with covid 19 and it turns out that the cells could not be infected.

    I wonder cause science is never transparent!

  4. All have not succeeded to date, but I think Hera cells combined with mRNA have a chance to succeed especially with billions of test subjects. This would also explain the need to do multiple injections and endless boosters, to pump more and more Hera cells in to people.

  5. In my point of view for them taking the cells was a good thing? No and Yes. My reasoning for no is because they did not get her permission. Yes she died and it was for research a possible good reason. Why I also said yes is because it was for research and she was dead so she could not say no or yes. Why I said no is because there both good reasons and you could not choose between one or the other when it comes to it really.

    1. In Rebecca Scoots book she states that at the time of Henrietta’s death they had to ask the family to give consent for an autopsy, which they gave reluctantly. The book also refers to a few years later changes being made obliging doctors/surgeons etc having to get “informed ” consent if cells or other parts are to be used for research. Read the book if you have not already done so.

  6. Your blog has provided useful information for the work. All the tips in the post are great. Thanks for sharing. keep blogging~!

  7. They took her genes without consent. And when the cells from this black woman repelled Covid 19 experiments in China paid for by NIH Grant’s to Isreali owned co., they decided to make her genes susceptible to Covid 19 using gain of function techniques. This allowed for target attack of her African descent and advanced age. Now all elderly and peoples of color die at a higher rate than other races.

    1. Exactly George. These cell lines are specific to the people from which Ms. Henrietta Lacks derived. If you were presented with a family tree of her family lineage you would be able to pin point the exact direction adverse effects would flow once you had a system that could be used to analyze same (VAERS). These scientists are very aware of what Ms. Lacks has provided them with and KNOW of a certainty there are others. They have used the public health system and abortion clinics as repositories and collection sites for cell lines for decades. The research is not publicly disseminated and most of us lay people are unaware of how we participate in the creation of science that is used against our demographics. We should be wary of anything that is pushed on us. History is replete with proof of a continual war against anything non-white. Science is one arm of that warfare. These facts make pushing any sort of medical device or so-called vaccine on any one by mandate unethical and immoral. The “scientific community” ought to be shamed for the abuses against humanity, but there’s too much money to be made on the backs of those “useless eaters” the elites despise as being in the way of their agenda.

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