Health
What to Know About mRNA Vaccines
Health Secretary Robert F. Kennedy, Jr., has repeatedly questioned the safety of mRNA vaccines against Covid-19. Scientists with funding from the National Institutes of Health were advised to scrub their grants of any reference to mRNA. Around the country, state legislatures are considering bills to ban or limit such vaccines, with one describing them as weapons of mass destruction.
While mRNA, or messenger RNA, has received widespread attention in recent years, scientists first discovered it in 1961. They have been studying it and exploring its promise in preventing infectious diseases and treating cancer and rare diseases ever since.
What is mRNA?
A large molecule found in all of our cells, mRNA is used to make every protein that our DNA directs our bodies to build. It does so by carrying information from DNA in the nucleus out to a cell’s protein-making machinery. A single mRNA molecule can be used to make many copies of a protein, but it is naturally programmed to die eventually, said Jeff Coller, a professor of RNA biology and therapeutics at Johns Hopkins University and a co-founder of an RNA therapeutics company.
How do mRNA vaccines work?
Right now, there are three FDA-approved vaccines available that use mRNA, two for Covid-19 and one for R.S.V., or respiratory syncytial virus, in older adults. These vaccines consist of strands of mRNA that code for specific viral proteins.
Say you get a Covid-19 vaccine. The strands of mRNA, packaged into tiny fat particles, go into your muscle and immune cells, said Robert Alexander Wesselhoeft, director of RNA therapeutics at the Gene and Cell Therapy Institute at Mass General Brigham. Protein factories in the cells then take instructions from the mRNA and manufacture a protein like the one found on the surface of a Covid-19 virus. Your body recognizes that protein as foreign, and mounts an immune response.
Most of the mRNA will be gone within a few days, but the body retains a “memory” of it in the form of antibodies, Dr. Coller said. As with other types of vaccines, immunity wanes both over time and as a virus evolves into new variants.
Why are mRNA vaccines being used now?
In the mid-2000s, scientists at the University of Pennsylvania figured out how to get foreign mRNA into human cells without it degrading first. That enabled researchers to develop it for use in vaccines.
The main use for such vaccines right now is to prevent infectious diseases, like Covid-19 and R.S.V., said Dr. Wesselhoeft, who founded a company that develops RNA therapies. The mRNA vaccines can be made very quickly because all of the components, other than the RNA sequence, remain the same across different vaccines.
This feature could be helpful for developing the annual flu vaccine, said Florian Krammer, a virologist at the Icahn School of Medicine at Mount Sinai, who has previously consulted for Pfizer and CureVac on mRNA therapies. Typically, scientists decide in February or March which influenza virus strains to include in a vaccine that will be rolled out in the United States in September. But by that time, a different strain may be dominant. Because an mRNA vaccine can be manufactured more quickly than the current flu shot, scientists could wait until May or June to see which strains are circulating, Dr. Krammer said, increasing the likelihood the vaccine will be effective.
Do these vaccines have risks?
A common question patients ask is whether an mRNA vaccine can affect their DNA, Dr. Boucher said. The answer is no. Our cells cannot convert mRNA into DNA, which means that it can’t be incorporated into our genome.
The vaccine for Covid-19 can cause muscle aches and flulike symptoms, but these are expected side effects for vaccines generally, Dr. Krammer said.
It’s been more than four years since the Covid-19 vaccine was first rolled out “and there are not long-term safety signals,” said Dr. Adam Ratner, a pediatric infectious disease specialist in New York. Many parents were concerned about myocarditis, an inflammation of the heart muscle that was reported as a possible side effect of the vaccine. But, Dr. Ratner said, the risk of such inflammation from an actual Covid-19 infection, or of long Covid or multisystem inflammatory syndrome in children, was far greater.
What else can mRNA be used for?
Vaccines using mRNA are currently being studied for a wide range of diseases, including cancer, cardiovascular disease, autoimmune disorders like Type 1 diabetes and rare diseases like cystic fibrosis, a genetic condition that results in excessively thick, sticky mucus that can plug the airways and damage the lungs.
In cancer, the idea is that the mRNA codes for a tumor protein that the immune system will recognize as foreign, telling the body to attack the tumor. In a genetic disorder like cystic fibrosis, it codes for a functioning version of a deficient protein to replace the faulty one and restore the mucus to healthy state.
A paper in the journal Nature earlier this year showed that an experimental mRNA vaccine for pancreatic cancer provoked an immune response in some patients after they had undergone surgery for the cancer. Patients who experienced that immune response lived longer without cancer than patients who did not.
Another recent paper showed that, in monkeys, an inhaled mRNA therapy could produce a protein needed to form cilia, the hairlike structures that line our airways and move mucus out of them. These proteins malfunction in a debilitating respiratory disorder called primary ciliary dyskinesia.
This research is still in early stages: The pancreatic cancer study, a Phase I trial, included only 16 patients, and there may have been other differences between the two groups that accounted for the different survival times. There is a long history of research showing that interventions may lead to immune responses without actually changing patients’ outcomes, explained Dr. Steven Rosenberg, chief of the surgery branch at the National Cancer Institute and an expert in cancer immunotherapy.
Dr. Richard Boucher, a pulmonologist at the University of North Carolina at Chapel Hill, noted that for lung diseases, it’s extremely difficult to safely get the particles carrying mRNA into exactly the right cells.
In general, Dr. Ratner said, mRNA vaccines are “exciting” in that they offer hope for disease treatments where prior technologies have failed. But mRNA therapy is still a drug technology like any other: In some diseases it likely will work, he said, “and in other cases it probably won’t.”
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As the popularity of GLP-1 drugs continues to climb, significant weight loss associated with the medications has been linked to a growing list of cosmetic concerns.
Some surgeons report that more patients are seeking treatments for so-called “Ozempic earlobes,” which reportedly appear thinner, longer or more sagging after the loss of facial fat.
“The use of semaglutides causes you to lose fat across your body, including the small, fat pads of the earlobes,” facial plastic surgeon Sachin S. Parikh, MD, told NewBeauty.
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“It’s important to note that semaglutides do not damage ear tissue or affect hearing in any way, so any intervention would be purely cosmetic,” added the California-based doctor.
Some of the potential treatments for “Ozempic earlobes” may include dermal filler, fat transfer, laser treatments or surgical earlobe reduction, according to the report.
As the popularity of GLP-1 drugs continues to climb, significant weight loss associated with the medications has been linked to a growing list of cosmetic concerns. (iStock)
Dr. Mohammed Asif from Duly Health and Care in Naperville, Illinois, said that while he hasn’t personally noticed an uptick in ear surgeries, he has seen a rise in other procedures due to GLP-1-triggered weight loss.
Some of those include panniculectomies (Ozempic skin removal surgery) and abdominoplasties (tummy tucks).
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“There has been a significant increase in body contouring procedures among patients with GLP-1 weight loss,” Asif told Fox News Digital.
“In my practice, I’ve seen a significant surge in breast lifts, panniculectomies (skin removal surgery), abdominoplasties (tummy tucks), brachioplasties (arm lifts) and thighplasties due to weight loss.”
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Healing and recovery are “far greater and less complicated” than with bariatric surgery weight loss, Asif noted.
“This is due to the gradual weight loss achieved over time with GLP-1s.”
“Ozempic breast” is another common complaint, according to Dr. Michael Omidi, a double board-certified plastic surgeon practicing in Beverly Hills.
“There has been a significant increase in body contouring procedures among patients with GLP-1 weight loss,” a doctor told Fox News Digital. (iStock)
“Women in their 30s and 40s would not typically need a breast lift, but when you’re taking drugs like Ozempic or Wegovy that cause rapid weight loss, women can see gravity take its toll on their breasts,” he told Fox News Digital.
“When women, especially younger ones, lose fat too fast, it causes the breasts, which are comprised of fat, glandular tissue and skin, to lose volume,” he went on. “The skin and supporting ligaments don’t always bouce back at the same rate as the weight loss, resulting in breasts that can appear saggy and deflated.”
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Dr. Samuel Golpanian, a double board-certified plastic surgeon in Beverly Hills, said he has seen “dozens” of patients – men and women alike – seeking treatments for so-called “Ozempic butt” after significant weight loss.
“This is an unintended consequence of taking GLP-1s,” he told Fox News Digital.
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“Such dramatic weight loss in a short period of time causes the skin not to tighten quickly enough to keep up with the body’s changes. Our buttocks have a large amount of fat, so when that volume disappears quickly, you’ll develop a flatter, saggier behind.”
“Such dramatic weight loss in a short period of time causes the skin not to tighten quickly enough to keep up with the body’s changes,” a surgeon said. (iStock)
Kristy Hamilton, MD, a Houston-based surgeon who is a member of the American Society of Plastic Surgeons (ASPS), agreed that a growing number of patients are seeking skin-tightening procedures after losing large amounts of weight with GLP-1s.
“We’re absolutely seeing more of those patients, and I expect that trend to continue,” said Hamilton in an ASPS report.
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“People are losing as much as 100 pounds on this medication – and when you’re losing that amount, that’s significant. You’re certainly going to have excess skin afterward.”
The ASPS lists the following body-contouring procedures as the ones most frequently performed after substantial weight loss.
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- Tummy tuck (abdominoplasty): Removes excess abdominal skin and fat
- Lower body lift (belt lipectomy): Addresses the abdomen, buttocks, hips and thighs
- Arm lift (brachioplasty): Removes hanging upper-arm skin
- Thigh lift: Tightens excess skin of the inner thighs
- Breast lift (mastopexy): Addresses sagging, deflated breasts after weight loss
- Facelift/neck lift: Addresses facial volume loss and skin laxity after major weight loss
“People are losing as much as 100 pounds on this medication – and when you’re losing that amount, that’s significant. You’re certainly going to have excess skin afterward.” (iStock)
Experts say adequate protein intake and resistance training can help minimize the loss of lean muscle mass that often accompanies rapid weight loss, which could reduce some of the cosmetic concerns.
Golpanian also emphasized the importance of eating enough protein.
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“It can be harder since your appetite is suppressed, but it’s so important to consume at least 110 grams of protein a day while taking a GLP-1 drug,” he advised.
“Also, I say this to my patients all the time: You have to lift weights to keep your muscles from atrophying. Strength training can help build muscles and preserve your glutes.”
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No sex for the win? This was the advice given to this year’s NBA champions.
New York Knicks owner James Dolan addressed the now-champs as they headed into the playoffs in April 2026, acknowledging their high potential to eventually win the championship.
“I don’t know if you understand what it would mean for you to win a championship this year … It would be life-changing,” he said. “It will stick with you the rest of your lives, and if you don’t win, you’ll be thinking about it the rest of your lives.”
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As Dolan’s inspirational speech to the team went on, he explained how the next 10 weeks would require each player to make sacrifices – watching their diets, getting proper sleep and perhaps even abstaining from sex.
“You need sacrifice and you need to eliminate all the distractions around you,” he said.
Jalen Brunson of the New York Knicks celebrates with the Bill Russell NBA Finals Most Valuable Player Award trophy and Knicks owner James Dolan after defeating the San Antonio Spurs in Game Five of the 2026 NBA Finals at Frost Bank Center in San Antonio, Texas, on June 13, 2026. (Gregory Shamus/Getty Images)
“I had this idea that maybe you should give up sex for the next 10 weeks,” the owner said. “You don’t have to give up sex for the next 10 weeks – but, like the Spartans … They denied themselves, so that they can have an edge. Get the edge.”
This received a few snickers from the team, and Dolan responded, “Don’t tell [your wives and girlfriends] you’re not going to have sex and don’t tell them it was my idea. But let them know what this is going to be like … and how they’re going to have to sacrifice, too.”
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Dr. Anna Elton, licensed marriage and family therapist and clinical sexologist in Massachusetts, confirmed that this belief has been around for centuries, dating back to the ancients Spartans and early Olympic competitors.
Avoiding sex can preserve energy, increase aggression and sharpen focus, according to Elton.
The theory behind abstaining from sex for better athletic performance supports that it can preserve energy, increase aggression and sharpen focus. (iStock)
But modern research has found little evidence that consensual sexual activity negatively impacts strength, endurance, reaction time or athletic performance when it occurs at least 10 hours before competition, the doctor countered.
However, “activity very close to competition may affect recovery measures,” she added. What may be more important, according to Elton, is the psychological value of abstinence.
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“Choosing to abstain can reinforce discipline and total commitment to a larger goal,” she said. “In those cases, the advantage may come more from mindset and focus than from any physical effect.”
“Whether the sacrifice is alcohol, social activities, favorite foods or sex, the message is often the same: ‘We are all in.’”
New York Knicks guard Jalen Brunson celebrates with teammates after the Knicks defeated the San Antonio Spurs in game five of the 2026 NBA Finals at Frost Bank Center in San Antonio, Texas, on June 13, 2026. (Geoff Burke/Imagn Images)
The science of abstinence
This discussion has historically focused on men, which Elton said is often based on “misconceptions about testosterone and energy depletion.”
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“Research has not demonstrated that normal sexual activity causes a meaningful decline in athletic performance, and concerns about testosterone depletion have not been consistently supported by the evidence,” she said.
“For women, sexual activity may have additional benefits related to stress reduction, emotional regulation and relationship satisfaction.”
Abstaining from sex for athletic performance may create a sense of discipline, minimize distractions, maintain focus on training and reinforce a team culture centered on sacrifice and commitment, experts say. (iStock)
In a separate interview with Fox News Digital, Dr. Anthony Puopolo, a men’s health expert and lead medical provider for RexMD, echoed Elton’s assessment that research largely does not support abstinence as a performance enhancer.
This is despite a small amount of evidence that suggests engaging in sexual activity within two hours of competition could pose a risk to cardiovascular recovery.
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“Unfortunately, nearly all studies (99%) have been conducted in males aged 20 to 40, so there is virtually no data on female athletes, older athletes or diverse populations,” said the Puerto Rico-based expert. “We know what to tell the Knicks, but we are not sure what to recommend for the New York Liberty.”
Importance of connection
Elton said abstinence may still offer psychological benefits for some competitors. “For some athletes, it can become part of a pre-competition ritual that enhances confidence,” she told Fox News Digital.
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Some other potential benefits of sexual activity include stress reduction, improved sleep, mood enhancement, emotional connection with a partner and relief from performance-related tension.
“Strong, supportive relationships are associated with better psychological resilience, which can be valuable during high-pressure competitions,” Elton said.
“One of the most overlooked performance advantages may be having a supportive relationship waiting at home,” a doctor said. (iStock)
“Ultimately, there is no universal rule,” she went on. “What helps one athlete perform at their best may not help another.”
Elton stressed that sleep, recovery, nutrition, stress management and support from loved ones are universal performance boosters.
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“Athletes devote tremendous attention to training their bodies, while overlooking the importance of their personal relationships,” she cautioned. “A supportive partner can be one of the greatest assets during a demanding season.”
“If competition requires temporary sacrifices, make those decisions together and keep communication open.”
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