Pregnant & Breastfeeding Women Who Get the COVID-19 Vaccine Are Protecting Their Infants, Research Suggests
Becky Cummings, who got vaccinated in December, snuggles her newborn, Clark, while he takes a nap.
Becky Cummings had multiple reasons to get vaccinated against COVID-19 while tending to her firstborn, Clark, who arrived in September 2020 at 27 weeks.
The 29-year-old intensive care unit nurse in Greensboro, North Carolina, had witnessed the devastation day in and day out as the virus took its toll on the young and old. But when she was offered the vaccine, she hesitated, skeptical of its rapid emergency use authorization.
Exclusion of pregnant and lactating mothers from clinical trials fueled her concerns. Ultimately, though, she concluded the benefits of vaccination outweighed the risks of contracting the potentially deadly virus.
"Long story short," Cummings says, in December "I got vaccinated to protect myself, my family, my patients, and the general public."
At the time, Cummings remained on the fence about breastfeeding, citing a lack of evidence to support its safety after vaccination, so she pumped and stashed breast milk in the freezer. Her son is adjusting to life as a preemie, requiring mother's milk to be thickened with formula, but she's becoming comfortable with the idea of breastfeeding as more research suggests it's safe.
"If I could pop him on the boob," she says, "I would do it in a heartbeat."
Now, a study recently published in the Journal of the American Medical Association found "robust secretion" of specific antibodies in the breast milk of mothers who received a COVID-19 vaccine, indicating a potentially protective effect against infection in their infants.
The presence of antibodies in the breast milk, detectable as early as two weeks after vaccination, lasted for six weeks after the second dose of the Pfizer-BioNTech vaccine.
"We believe antibody secretion into breast milk will persist for much longer than six weeks, but we first wanted to prove any secretion at all after vaccination," says Ilan Youngster, the study's corresponding author and head of pediatric infectious diseases at Shamir Medical Center in Zerifin, Israel.
That's why the research team performed a preliminary analysis at six weeks. "We are still collecting samples from participants and hope to soon be able to comment about the duration of secretion."
As with other respiratory illnesses, such as influenza and pertussis, secretion of antibodies in breast milk confers protection from infection in infants. The researchers expect a similar immune response from the COVID-19 vaccine and are expecting the findings to spur an increase in vaccine acceptance among pregnant and lactating women.
A COVID-19 outbreak struck three families the research team followed in the study, resulting in at least one non-breastfed sibling developing symptomatic infection; however, none of the breastfed babies became ill. "This is obviously not empirical proof," Youngster acknowledges, "but still a nice anecdote."
Leaps.org inquired whether infants who derive antibodies only through breast milk are likely to have a lower immunity than infants whose mothers were vaccinated while they were in utero. In other words, is maternal transmission of antibodies stronger during pregnancy than during breastfeeding, or about the same?
"This is a different kind of transmission," Youngster explains. "When a woman is infected or vaccinated during pregnancy, some antibodies will be transferred through the placenta to the baby's bloodstream and be present for several months." But in the nursing mother, that protection occurs through local action. "We always recommend breastfeeding whenever possible, and, in this case, it might have added benefits."
A study published online in March found COVID-19 vaccination provided pregnant and lactating women with robust immune responses comparable to those experienced by their nonpregnant counterparts. The study, appearing in the American Journal of Obstetrics and Gynecology, documented the presence of vaccine-generated antibodies in umbilical cord blood and breast milk after mothers had been vaccinated.
Natali Aziz, a maternal-fetal medicine specialist at Stanford University School of Medicine, notes that it's too early to draw firm conclusions about the reduction in COVID-19 infection rates among newborns of vaccinated mothers. Citing the two aforementioned research studies, she says it's biologically plausible that antibodies passed through the placenta and breast milk impart protective benefits. While thousands of pregnant and lactating women have been vaccinated against COVID-19, without incurring adverse outcomes, many are still wondering whether it's safe to breastfeed afterward.
It's important to bear in mind that pregnant women may develop more severe COVID-19 complications, which could lead to intubation or admittance to the intensive care unit. "We, in our practice, are supporting pregnant and breastfeeding patients to be vaccinated," says Aziz, who is also director of perinatal infectious diseases at Stanford Children's Health, which has been vaccinating new mothers and other hospitalized patients at discharge since late April.
Earlier in April, Huntington Hospital in Long Island, New York, began offering the COVID-19 vaccine to women after they gave birth. The hospital chose the one-shot Johnson & Johnson vaccine for postpartum patients, so they wouldn't need to return for a second shot while acclimating to life with a newborn, says Mitchell Kramer, chairman of obstetrics and gynecology.
The hospital suspended the program when the Food and Drug Administration and the Centers for Disease Control and Prevention paused use of the J&J vaccine starting April 13, while investigating several reports of dangerous blood clots and low platelet counts among more than 7 million people in the United States who had received that vaccine.
In lifting the pause April 23, the agencies announced the vaccine's fact sheets will bear a warning of the heightened risk for a rare but serious blood clot disorder among women under age 50. As a result, Kramer says, "we will likely not be using the J&J vaccine for our postpartum population."
So, would it make sense to vaccinate infants when one for them eventually becomes available, not just their mothers? "In general, most of the time, infants do not have as good of an immune response to vaccines," says Jonathan Temte, associate dean for public health and community engagement at the University of Wisconsin School of Medicine and Public Health in Madison.
"Many of our vaccines are held until children are six months of age. For example, the influenza vaccine starts at age six months, the measles vaccine typically starts one year of age, as do rubella and mumps. Immune response is typically not very good for viral illnesses in young infants under the age of six months."
So far, the FDA has granted emergency use authorization of the Pfizer-BioNTech vaccine for children as young as 16 years old. The agency is considering data from Pfizer to lower that age limit to 12. Studies are also underway in children under age 12. Meanwhile, data from Moderna on 12-to 17-year-olds and from Pfizer on 12- to 15-year-olds have not been made public. (Pfizer announced at the end of March that its vaccine is 100 percent effective in preventing COVID-19 in the latter age group, and FDA authorization for this population is expected soon.)
"There will be step-wise progression to younger children, with infants and toddlers being the last ones tested," says James Campbell, a pediatric infectious diseases physician and head of maternal and child clinical studies at the University of Maryland School of Medicine Center for Vaccine Development.
"Once the data are analyzed for safety, tolerability, optimal dose and regimen, and immune responses," he adds, "they could be authorized and recommended and made available to American children." The data on younger children are not expected until the end of this year, with regulatory authorization possible in early 2022.
For now, Vonnie Cesar, a family nurse practitioner in Smyrna, Georgia, is aiming to persuade expectant and new mothers to get vaccinated. She has observed that patients in metro Atlanta seem more inclined than their rural counterparts.
To quell some of their skepticism and fears, Cesar, who also teaches nursing students, conceived a visual way to demonstrate the novel mechanism behind the COVID-19 vaccine technology. Holding a palm-size physical therapy ball outfitted with clear-colored push pins, she simulates the spiked protein of the coronavirus. Slime slathered at the gaps permeates areas around the spikes—a process similar to how our antibodies build immunity to the virus.
These conversations often lead hesitant patients to discuss vaccination with their husbands or partners. "The majority of people I'm speaking with," she says, "are coming to the conclusion that this is the right thing for me, this is the common good, and they want to make sure that they're here for their children."
CORRECTION: An earlier version of this article mistakenly stated that the COVID-19 vaccines were granted emergency "approval." They have been granted emergency use authorization, not full FDA approval. We regret the error.
Defenders of civil liberties fear that the erosion of privacy will become a long-term consequence of the pandemic.
As countries around the world combat the coronavirus outbreak, governments that already operated sophisticated surveillance programs are ramping up the tracking of their citizens.
"The potential for invasions of privacy, abuse, and stigmatization is enormous."
Countries like China, South Korea, Israel, Singapore and others are closely monitoring citizens to track the spread of the virus and prevent further infections, and policymakers in the United States have proposed similar steps. These shifts in policy have civil liberties defenders alarmed, as history has shown increases in surveillance tend to stick around after an emergency is over.
In China, where the virus originated and surveillance is already ubiquitous, the government has taken measures like having people scan a QR code and answer questions about their health and travel history to enter their apartment building. The country has also increased the tracking of cell phones, encouraged citizens to report people who appear to be sick, utilized surveillance drones, and developed facial recognition that can identify someone even if they're wearing a mask.
In Israel, the government has begun tracking people's cell phones without a court order under a program that was initially meant to counter terrorism. Singapore has also been closely tracking people's movements using cell phone data. In South Korea, the government has been monitoring citizens' credit card and cell phone data and has heavily utilized facial recognition to combat the spread of the coronavirus.
Here at home, the United States government and state governments have been using cell phone data to determine where people are congregating. White House senior adviser Jared Kushner's task force to combat the coronavirus outbreak has proposed using cell phone data to track coronavirus patients. Cities around the nation are also using surveillance drones to maintain social distancing orders. Companies like Apple and Google that work closely with the federal government are currently developing systems to track Americans' cell phones.
All of this might sound acceptable if you're worried about containing the outbreak and getting back to normal life, but as we saw when the Patriot Act was passed in 2001 in the wake of the 9/11 terrorist attacks, expansions of the surveillance state can persist long after the emergency that seemed to justify them.
Jay Stanley, senior policy analyst with the ACLU Speech, Privacy, and Technology Project, says that this public health emergency requires bold action, but he worries that actions may be taken that will infringe on our privacy rights.
"This is an extraordinary crisis that justifies things that would not be justified in ordinary times, but we, of course, worry that any such things would be made permanent," Stanley says.
Stanley notes that the 9/11 situation was different from this current situation because we still face the threat of terrorism today, and we always will. The Patriot Act was a response to that threat, even if it was an extreme response. With this pandemic, it's quite possible we won't face something like this again for some time.
"We know that for the last seven or eight decades, we haven't seen a microbe this dangerous become a pandemic, and it's reasonable to expect it's not going to be happening for a while afterward," Stanley says. "We do know that when a vaccine is produced and is produced widely enough, the COVID crisis will be over. This does, unlike 9/11, have a definitive ending."
The ACLU released a white paper last week outlining the problems with using location data from cell phones and how policymakers should proceed when they discuss the usage of surveillance to combat the outbreak.
"Location data contains an enormously invasive and personal set of information about each of us, with the potential to reveal such things as people's social, sexual, religious, and political associations," they wrote. "The potential for invasions of privacy, abuse, and stigmatization is enormous. Any uses of such data should be temporary, restricted to public health agencies and purposes, and should make the greatest possible use of available techniques that allow for privacy and anonymity to be protected, even as the data is used."
"The first thing you need to combat pervasive surveillance is to know that it's occurring."
Sara Collins, policy counsel at the digital rights organization Public Knowledge, says that one of the problems with the current administration is that there's not much transparency, so she worries surveillance could be increased without the public realizing it.
"You'll often see the White House come out with something—that they're going to take this action or an agency just says they're going to take this action—and there's no congressional authorization," Collins says. "There's no regulation. There's nothing there for the public discourse."
Collins says it's almost impossible to protect against infringements on people's privacy rights if you don't actually know what kind of surveillance is being done and at what scale.
"I think that's very concerning when there's no accountability and no way to understand what's actually happening," Collins says. "The first thing you need to combat pervasive surveillance is to know that it's occurring."
We should also be worried about corporate surveillance, Collins says, because the tech companies that keep track of our data work closely with the government and do not have a good track record when it comes to protecting people's privacy. She suspects these companies could use the coronavirus outbreak to defend the kind of data collection they've been engaging in for years.
Collins stresses that any increase in surveillance should be transparent and short-lived, and that there should be a limit on how long people's data can be kept. Otherwise, she says, we're risking an indefinite infringement on privacy rights. Her organization will be keeping tabs as the crisis progresses.
It's not that we shouldn't avail ourselves of modern technology to fight the pandemic. Indeed, once lockdown restrictions are gradually lifted, public health officials must increase their ability to isolate new cases and trace, test, and quarantine contacts.
But tracking the entire populace "Big Brother"-style is not the ideal way out of the crisis. Last week, for instance, a group of policy experts -- including former FDA Commissioner Scott Gottlieb -- published recommendations for how to achieve containment. They emphasized the need for widespread diagnostic and serologic testing as well as rapid case-based interventions, among other measures -- and they, too, were wary of pervasive measures to follow citizens.
The group wrote: "Improved capacity [for timely contact tracing] will be most effective if coordinated with health care providers, health systems, and health plans and supported by timely electronic data sharing. Cell phone-based apps recording proximity events between individuals are unlikely to have adequate discriminating ability or adoption to achieve public health utility, while introducing serious privacy, security, and logistical concerns."
The bottom line: Any broad increases in surveillance should be carefully considered before we go along with them out of fear. The Founders knew that privacy is integral to freedom; that's why they wrote the Fourth Amendment to protect it, and that right shouldn't be thrown away because we're in an emergency. Once you lose a right, you don't tend to get it back.
Scientific breakthroughs offer our only solution for a safe return to normal life.
Kira Peikoff was the editor-in-chief of Leaps.org from 2017 to 2021. As a journalist, her work has appeared in The New York Times, Newsweek, Nautilus, Popular Mechanics, The New York Academy of Sciences, and other outlets. She is also the author of four suspense novels that explore controversial issues arising from scientific innovation: Living Proof, No Time to Die, Die Again Tomorrow, and Mother Knows Best. Peikoff holds a B.A. in Journalism from New York University and an M.S. in Bioethics from Columbia University. She lives in New Jersey with her husband and two young sons. Follow her on Twitter @KiraPeikoff.