Childhood vaccination rates are backsliding across the U.S.


Some children have compromised immune systems or illnesses that prevent them from getting vaccines. Increasingly, however, families are citing “religious” or “personal” reasons for forgoing vaccination.

That kind of excuse has been repeatedly encouraged by Kennedy, who says vaccination is a “personal choice.”

HHS has notified schools and clinics that receive federal money from the Vaccines for Children Program, which provides free shots for uninsured or underinsured kids, that they would be required to recognize any “religious and conscience-based exemptions to vaccine mandates.”

Bill Winfrey, vice president of policy and strategic initiatives at Saint Louis Integrated Health Network — a nonprofit that works to tackle health disparities — believes doubts about vaccine safety sown by the “most trusted health officials in the country” are partly to blame.

“In a situation of doubt, it’s just easier to be inactive. It’s easier to say, ‘Well, if there’s any question, I’m just not going to do it,’” he said.

For most of the nearly 20% of kindergartners who haven’t had their full schedule of shots, their families have never requested an exemption; the children are simply inadequately immunized.

‘Measles can be deadly’

Kimberly Jones, a mother of five living in a vibrant, diverse area south of St. Louis’ downtown area, was careful to make sure her four older children were fully vaccinated. Any shot their pediatrician recommended, she had the children get them on schedule. They were all healthy.

Her view on vaccines, however, changed when her youngest child, 4-year-old Za’riyah, stopped meeting typical developmental milestones around the time the little girl got her first MMR shot in 2023.

Kimberly Jones with her youngest child, 4-year-old Za’riyah. Jones has become increasingly skeptical of vaccines in recent years.Jason Kane / NBC News

Za’riyah’s since been diagnosed with autism. Though there’s no scientific evidence linking the MMR vaccine to disorders like autism, Jones, 44, said the dramatic increase in autism spectrum disorder diagnoses over the past two decades makes her question whether the shots have changed somehow.

“I no longer trust any vaccines, old or new,” Jones said.

Boleyjack of Saint Louis Public Schools said more parents have shared their worries about autism and vaccines in recent years.

“I usually just use my own personal story to say, ‘You know what? I have a child with autism. I strongly do not believe that his autism was caused from immunization,’” she said. “There’s no research to back it up.”

Some have changed their minds. Others haven’t. “And that’s fine,” she said. “I just want them to have accurate information.”

Boleyjack’s goal for the coming school year is to hit an 80% vaccination rate within the public schools — still far below herd immunity, but an improvement — by educating parents and increasing school-based access to vaccines and general health care.

“Measles can be deadly,” she said. “That’s what’s scary about it.”

‘Do you have a gun in your home?’

For St. Louis parents Emily Pratt, 39, and her husband, Ryan Pratt, 41, the declining vaccination rates are a cause for alarm.

Penelope and Lucy Pratt pose for a portrait
Penelope, left, and Lucy Pratt outside their house in St. Louis.Bryan Birks for NBC News

Their young daughter, Lucy, has a rare autoimmune disease called juvenile dermatomyositis, or JDM, that leaves her almost defenseless against even minor illnesses. She’s on medication to suppress her overactive immune system from attacking her body.

That means Lucy has little to no ability to fight off even a common cold.

“We have four kids. If one of them brings a cold home, they’re better in three days,” Emily Pratt said. But Lucy “has a cold for two weeks. She gets sicker than typical kids.”



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Scale AI CEO says China has quickly caught the U.S. with DeepSeek


The U.S. may have led China in the artificial intelligence race for the past decade, according to Alexandr Wang, CEO of Scale AI, but on Christmas Day, everything changed.

Wang, whose company provides training data to key AI players including OpenAI, Google and Meta, said Thursday at the World Economic Forum in Davos, Switzerland, that DeepSeek, the leading Chinese AI lab, released an “earth-shattering model” on Christmas Day, then followed it up with a powerful reasoning-focused AI model, DeepSeek-R1, which competes with OpenAI’s recently released o1 model.

“What we’ve found is that DeepSeek … is the top performing, or roughly on par with the best American models,” Wang said.

In an interview with CNBC, Wang described the artificial intelligence race between the U.S. and China as an “AI war,” adding that he believes China has significantly more Nvidia H100 GPUs — AI chips that are widely used to build leading powerful AI models — than people may think, especially considering U.S. export controls.

Wang also said he believes the AI sector will reach a trillion dollars, on par with estimates that the generative AI market is poised to top $1 trillion in revenue within a decade.

Read more CNBC reporting on AI

“The United States is going to need a huge amount of computational capacity, a huge amount of infrastructure,” Wang said, later adding, “We need to unleash U.S. energy to enable this AI boom.”

Earlier this week, President Donald Trump announced a joint venture with OpenAI, Oracle and SoftBank to invest billions of dollars in U.S. AI infrastructure. The project, Stargate, was unveiled at the White House by Trump, SoftBank CEO Masayoshi Son, Oracle co-founder Larry Ellison and OpenAI CEO Sam Altman. Key initial technology partners will include Microsoft, Nvidia and Oracle, as well as semiconductor company Arm. They said they would invest $100 billion to start and up to $500 billion over the next four years.

In the interview Thursday, Wang said he believes that it’ll take two to four years to reach artificial general intelligence, or AGI, a widely cited but vaguely defined benchmark used in the AI sector to denote a branch of AI pursuing technology that equals or surpasses human intellect on a wide range of tasks. AGI is a hotly debated topic, with some leaders saying we’re close to attaining it and some saying it’s not possible at all. Wang said his own definition of AGI is “powerful AI systems that are able to use a computer just like you or I could … and basically be a remote worker in the most capable way.”

Anthropic, the Amazon-backed AI startup founded by ex-OpenAI research executives, ramped up its technology development throughout the past year, and in October, the startup said that its AI agents were able to use computers like humans can to complete complex tasks. Anthropic’s Computer Use capability allows its technology to interpret what’s on a computer screen, select buttons, enter text, navigate websites and execute tasks through any software and real-time internet browsing, the startup said.

The tool can “use computers in basically the same way that we do,” Jared Kaplan, Anthropic’s chief science officer, told CNBC in an interview at the time. He said it can do tasks with “tens or even hundreds of steps.”

OpenAI reportedly plans to introduce a similar feature soon.

When asked which U.S. artificial intelligence startups are leading the AI race right now, Wang said that models each have their own strengths — for instance, OpenAI’s models are great at reasoning, while Anthropic’s are great at coding.

“The space is becoming more competitive, not less competitive,” he said.

Correction: This article has been updated to correct the name of DeepSeek’s reasoning-focused AI model, DeepSeek-R1.

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