Science
Contributor: On autism and vaccines, there are lies, damned lies and statistics
During an interview in late April with Dr. Phil, Robert F. Kennedy Jr. reiterated his appeal to parents on vaccine safety: “We live in a democracy, and part of the responsibility of being a parent is to do your own research.”
The U.S. health secretary has also announced his own investigation, pledging to find an answer to the autism “epidemic” by September. It’s an ambitious goal. It’s also a realistic one but only if he already has an answer in mind.
To tell the story you want with statistics, you don’t have to lie or fabricate data — though that happens, too. More often, statistics are manipulated, figures massaged and results skewed through subtler means. Sometimes, it’s sloppiness or unconscious bias at work. Other times, the distortion is deliberate.
Whether the numbers attempt to tell a story about the economy, immigration, education or public health, we should empower ourselves to recognize the deception.
Vaccine data are far from immune to statistical trickery and its consequences.
Not only might individuals skip a vaccine and get unnecessarily sick, but the viral spread of misinformation can poke holes in the herd immunity needed to protect a population. One new, untampered statistic tells a chilling story: A meager 10% drop from today’s already dangerously low measles vaccination rates could spark an estimated 13-fold increase in annual cases.
Statistics wield incredible power. I developed a deep respect for them during my first career as a biostatistician. Today, as a journalist, I see numbers leveraged for good and for bad. I’ve seen them help the public and policymakers interpret complex data, detect patterns and make better decisions — evidenced in my reporting on data dashboards during the COVID-19 pandemic. I’ve also seen data withheld and statistics doctored for less-than-noble aims by chemical companies, the gun industry, police departments, the U.S. military, climate change deniers and vaccine skeptics, to name a few.
If left unaware of the deceit, the public can’t hold these groups accountable. And if citizens base their votes and other decisions — like whether to vaccinate their child — on distorted or false information, our democracy and our health lose again.
Fortunately, inoculation against misinformation is available. As Kennedy and his collaborators dig into vaccine and autism data, as measles cases mount, and as you “do your own research” or simply digest your news and social feeds, here are five red flags to watch for.
Chance
The infamous paper that launched the vaccine-autism controversy was based on just 12 children. Its author claimed that eight showed signs of developmental regression after receiving the measles-mumps-rubella vaccine. The study was later retracted for scientific misconduct. But even without fraud, the sample size should raise alarm. Chance alone could explain such a small cluster of cases. Contrast that with rigorous studies — like one in Denmark with more than 650,000 participants — that consistently find no relationship between the MMR vaccine and autism.
We should be just as wary when studies test a grab bag of possible outcomes. Suppose researchers ask whether a vaccine causes heart disease, diabetes, any of a dozen types of cancer or any of five neurodevelopmental disorders. Even if the vaccine is in reality not affecting any of those 20 outcomes, when researchers try to study so many things all at once, statistical noise can mean one may erroneously appear “significant” just by chance. A more rigorous and targeted study would be far less likely to give that false positive.
Count quality
Big numbers can impress. But quality counts. In 2021, the Delphi-Facebook survey estimated near real-time COVID-19 vaccine uptake using weekly responses from around 250,000 people. On paper, the large sample size conveyed statistical confidence. But in practice, the data missed the mark. The sample was biased and unrepresentative of the overall population. By late May, the study had overestimated vaccine uptake by a wide margin — 70% compared with the true rate of 53%. That inflated figure may have lulled the public and policymakers into a false sense of security.
Beware, too, of the misuse of raw data. Figures from the Vaccine Adverse Event Reporting System appear in many papers and posts asserting vaccine harms. But this system was set up only as an early warning system. Anyone can submit a report on a suspected reaction. If a hint of a pattern emerges, then researchers will investigate to determine if the signal represents an actual risk. As its own website warns, the initial reports may be “incomplete, inaccurate, coincidental, or unverifiable.” People may be apt to connect an event that occurs shortly after vaccination with the shot itself, for example, especially if they personally fear the safety of vaccines. To demonstrate the system’s fallibility, a doctor filed a report saying he turned into the Incredible Hulk after receiving a flu vaccine. The entry was initially accepted into the database.
Cherry-picking
One study circulating in the anti-vax community was led by David Geier, the same figure tapped by Kennedy to head his federal autism and vaccine investigation. The study found a connection between autism and vaccines containing the preservative thimerosal. But it hinges on a critical flaw: Cases of autism and the comparison group came from different time periods. Because vaccination rates changed dramatically over time, the design introduced a spurious association.
Among myriad ways to manufacture a desired conclusion is the strategic choice of time frame, analysis method or how the data are presented. By plotting only convenient variables or truncating inconvenient values, for example, you can tell the story of your choosing. One COVID-era graph appeared to show that vaccines did not prevent deaths. The trick? It compared vaccine uptake with cumulative deaths — a number that can only rise over time, and so of course would broadly move in the same direction as the uptake rate of a desperately needed new vaccine that the public is clamoring for.
Another sleight of hand to play down the size of a problem: Acknowledge a not-so-unusual number of outbreaks while ignoring how large or how deadly those outbreaks were, just as Kennedy did in February with measles.
Correlation vs. causation
A widely shared study recently referenced by Kennedy reports a link between vaccination and neurodevelopmental disorders among 9-year-olds in Florida. This one, too, is riddled with problems — namely, its failure to account for other factors that could explain the results. Children whose parents more regularly use the healthcare system, for example, are more likely to get both vaccinated and diagnosed. Healthcare engagement confounds the relationship. So, we can’t say the vaccine caused neurodevelopmental disorders any more than we could say that increased consumption of margarine resulted in a higher divorce rate in Maine. These are cases of correlation, not causation.
Something similar and even more interesting cropped up when people compared death rates by COVID-19 vaccination status. At first glance, an unexpected pattern emerged: The vaccinated were dying at about twice the rate of the unvaccinated. The catch here? The analysis didn’t account for age. Older people were more likely both to die and to get vaccinated. Once researchers broke the data down into age groups, a more accurate — and reverse — picture emerged: The unvaccinated were dying at higher rates.
Context and conflicts
Talk of an uptick in autism diagnoses often skips crucial context: expanded awareness, broader diagnostic criteria and financial incentives for diagnosis. There could well be a surge in the number of cases without any surge in the true incidence of the disorder.
Also, discussions motivated by a desire to explain autism or to oppose vaccines tend to omit the robust studies that have debunked any link between vaccines and autism — because those would be unhelpful to the agendas. Vaccine opponents may further ignore the glaring conflicts of interest behind many of the studies still pushing that autism narrative. Geier had a study retracted, in part, for not disclosing his involvement in vaccine-related litigation.
Conflicts of interest surround Kennedy as well. He has spent years pushing anti-vaccine claims despite overwhelming evidence of vaccine safety and despite not being a doctor or a scientist. Now that he is in a position of authority over public health, he should at least be held to the same ethical standards as a scientist. Modern scientific practice calls for statisticians to specify their hypotheses and analysis plans before data are collected. This ensures transparency and objectivity, and reduces the risk of data dredging and misleading results. Statisticians follow where the data lead rather than mold or seek out data to fit a predetermined narrative.
Kennedy’s team appears to be following a different playbook. According to a former top vaccine official, Kennedy’s team requested a wish list of data seemingly to justify their autism theory: The team asked for cases of brain swelling and deaths caused by the measles vaccine. The official said there are no such cases. Someone who keeps hunting for evidence to back up his discredited theory is not conducting science.
Our stories should be malleable. Our statistics should not.
Lynne Peeples, a science writer, is the author of “The Inner Clock: Living in Sync With Our Circadian Rhythms.”
Our universe might be chock-full of cosmic wonder, but you can observe only a fraction of astronomical phenomena with the naked eye. Meteor showers, natural fireworks that streak brightly across the night sky, are one of them.
The latest observable meteor shower will be the Lyrids, which has been active since April 14 and is forecast to continue through April 30. The shower reaches its peak April 21 to 22, or Tuesday night into Wednesday morning.
According to NASA, the Lyrids are one of the oldest known meteor showers, and have been enjoyed by stargazers for nearly 3,000 years. Their bright, speedy streaks are caused by the dusty debris from a comet named Thatcher. They appear to spring from the constellation Lyra, which right now can be seen in the eastern sky at night in the Northern Hemisphere.
The moon will be about 27 percent full tonight, appearing as a thick crescent in the sky, according to the American Meteor Society.
To get a hint at when to best watch for the Lyrids, you can use this tool, which relies on data from the Global Meteor Network. It shows fireball activity levels in real time.
And while you gaze at the heavens, keep an eye out for other stray meteors streaking across the night sky. Skywatchers are reporting that the amount of fireballs is double what is usually seen by this point in the year.
Where meteor showers come from
There is a chance you might see a meteor on any given night, but you are most likely to catch one during a shower. Meteor showers are caused by Earth passing through the rubble trailing a comet or asteroid as it swings around the sun. This debris, which can be as small as a grain of sand, leaves behind a glowing stream of light as it burns up in Earth’s atmosphere.
Meteor showers occur around the same time every year and can last for days or weeks. But there is only a small window when each shower is at its peak, which happens when Earth reaches the densest part of the cosmic debris. The peak is the best time to look for a shower. From our point of view on Earth, the meteors will appear to come from the same point in the sky.
The Perseid meteor shower, for example, peaks in mid-August from the constellation Perseus. The Geminids, which occur every December, radiate from the constellation Gemini.
How to watch a meteor shower
Michelle Nichols, the director of public observing at the Adler Planetarium in Chicago, recommends forgoing the use of telescopes or binoculars while watching a meteor shower.
“You just need your eyes and, ideally, a dark sky,” she said.
That’s because meteors can shoot across large swaths of the sky, so observing equipment can limit your field of view.
Some showers are strong enough to produce up to 100 streaks an hour, according to the American Meteor Society, though you probably won’t see that many.
“Almost everybody is under a light-polluted sky,” Ms. Nichols said. “You may think you’re under a dark sky, but in reality, even in a small town, you can have bright lights nearby.”
Planetariums, local astronomy clubs or even maps like this one can help you figure out where to go to escape excessive light. The best conditions for catching a meteor shower are a clear sky with no moon or cloud cover, sometime between midnight and sunrise. (Moonlight affects visibility in the same way as light pollution, washing out fainter sources of light in the sky.) Make sure to give your eyes at least 30 minutes to adjust to seeing in the dark.
Ms. Nichols also recommends wearing layers, even during the summer. “You’re going to be sitting there for quite a while, watching,” she said. “It’s going to get chilly, even in August.”
Bring a cup of cocoa or tea for even more warmth. Then lie back, scan the sky and enjoy the show.
Where weather is least likely to affect your view
Storm systems sweep across the country in early spring, and some will be obscuring skies tonight. But there will still be plenty of areas with clear skies, particularly in parts of the central United States.
“The best spot is going to be in the Upper Midwest,” said Rich Bann, a meteorologist with the Weather Prediction Center.
Minnesota, Wisconsin and Iowa will offer especially good sky-viewing weather and a beach on the Great Lakes could be a nice spot to look up at the stars.
But don’t expect to view the show from Chicago, as Illinois could see some thunderstorms. The weather will be better in the Northern and Central Plains, particularly the eastern Dakotas.
High, wispy clouds are expected over the Ohio and Tennessee Valleys and into parts of the Mid-Atlantic. But, Mr. Bann said, “you may be able to see some shooting stars through thin clouds.”
Clouds will be draped across much of the Southeast and the Northeast, though there could be some clearing in Florida, Georgia, the Carolinas and Virginia. Remember, the meteors could be visible all night long. If you look outside and see clouds, try again later.
Catching the spectacle will be challenging across much of the West, particularly from Washington into Northern California, where a storm system is bringing rain and snow. That system will move east overnight.
There are likely to be some pockets of clear skies at times across southern Nevada, northwest Arizona and southwest Utah, Mr. Bann said.
Amy Graff contributed reporting.
WASHINGTON — Amid growing national security concerns, the FBI said Tuesday that it has launched a broad investigation in the deaths or disappearances of at least 10 scientists and staff connected to highly sensitive research, including four from the Los Angeles area.
“The FBI is spearheading the effort to look for connections into the missing and deceased scientists. We are working with the Department of Energy, Department of War, and with our state and state and local law enforcement partners to find answers,” the agency said in a statement.
The FBI’s announcement comes after the House Oversight Committee announced that it would investigate reports of the disappearance and deaths of the scientists, sending letters seeking information from the agencies involved in the federal inquiry as well as NASA, which owns the Jet Propulsion Laboratory in La Cañada Flintridge, where three of the missing or dead scientists worked.
“If the reports are accurate, these deaths and disappearances may represent a grave threat to U.S. national security and to U.S. personnel with access to scientific secrets,” Reps. James Comer (R-Ky.), chairman of the committee, and Eric Burlison (R-Mo.) wrote in the letters.
President Trump told reporters last week that he had been briefed on the missing and dead scientists, which he described as “pretty serious stuff.” He said at the time that he expected answers on whether the deaths were connected “in the next week and a half.”
Michael David Hicks, who studied comets and asteroids at JPL, was the first of the scientists who disappeared or died. He died on July 30, 2023, at the age of 59. No cause of death was disclosed.
A year later, JPL physicist Frank Maiwald died at 61, with no cause of death disclosed.
Two other Los Angeles scientists are part of the string of deaths and disappearances.
On June 22, 2025, Monica Jacinto Reza, a materials scientist at JPL, disappeared while on a hike near Mt. Waterman in the San Gabriel Mountains.
On Feb. 16, Caltech astrophysicist Carl Grillmair was fatally shot on the porch of his Llano home. The Los Angeles County Sheriff’s department arrested Freddy Snyder, 29, in connection with the shooting. Snyder had been arrested in December on suspicion of trespassing on Grillmair’s property.
Snyder has been charged with murder.
There is no evidence at this point that the deaths and disappearances, which occurred over a span of four years, are connected.
A spokesperson for NASA, which owns JPL, said in a statement on X that the agency is “coordinating and cooperating with the relevant agencies in relation to the missing scientists.
“At this time, nothing related to NASA indicates a national security threat,” agency spokesperson Bethany Stevens wrote. “The agency is committed to transparency and will provide more information as able.”
Representatives from Caltech, which manages JPL, did not immediately respond to a request for comment.
The sun had barely risen over the Pacific Ocean when a small motorboat carrying a team of Indigenous artisans and Mexican biologists dropped anchor in a rocky cove near Bahías de Huatulco.
Mauro Habacuc Avendaño Luis, one of the craftsmen, was the first to wade to shore. With an agility belying his age, he struck out over the boulders exposed by low tide. Crouching on a slippery ledge pounded by surf, he reached inside a crevice between two rocks. There, lodged among the urchins, was a snail with a knobby gray shell the size of a walnut. The sight might not dazzle tourists who travel here to see humpback whales, but for Mr. Avendaño, 85, these drab little mollusks represent a way of life.
Marine snails in the genus Plicopurpura are sacred to the Mixtec people of Pinotepa de Don Luis, a small town in southwestern Oaxaca. Men like Mr. Avendaño have been sustainably “milking” them for radiant purple dye for at least 1,500 years. The color suffuses Mixtec textiles and spiritual beliefs. Called tixinda, it symbolizes fertility and death, as well as mythic ties between lunar cycles, women and the sea.
The future of these traditions — and the fate of the snails — are uncertain. The mollusks are subject to intense poaching pressure despite federal protections intended to protect them. Fishermen break them (and the other mollusks they eat) open and sell the meat to local restaurants. Tourists who comb the beaches pluck snails off the rocks and toss them aside.
A severe earthquake in 2020 thrust formerly submerged parts of their habitat above sea level, fatally tossing other mollusks in the snail’s food web to the air, and making once inaccessible places more available to poachers.
Decades ago, dense clusters of snails the size of doorknobs were easy to find, according to Mr. Avendaño. “Full of snails,” he said, sweeping a calloused, violet-stained hand across the coves. Now, most of the snails he finds are small, just over an inch, and yield only a few milliliters of dye.
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