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Illustration: Sarah Grillo/Axios

More kids are landing in the hospital due to COVID and it's not yet clear if it's because the Delta variant is causing more serious illness in kids.

Why it matters: Hospitals are raising concerns about the increasing impact of COVID on kids at the same time schools around the country are preparing to head back for in-person instruction — many without the protection of vaccination or mask mandates.

Driving the news: The latest numbers from the American Academy of Pediatrics show there were nearly 94,000 cases of COVID among kids in the last week, or about 15% of weekly total cases. Kids made up between 1.5% and 3.5% of total hospitalizations, they said.

  • But while serious illness in kids is still comparatively rare compared to adults, pediatric hospitalizations in some areas of the country have reached worrying levels.
  • There is an "epidemic" of very young COVID patients at Children's Hospital New Orleans, physician-in-chief Mark Kline told Robin Roberts on Good Morning America. Half the kids in the hospital are under two years old, he said.

Infectious disease doctors agree the high level of transmission of the Delta virus, particularly in regions of the country with low vaccination rates, is in large part to blame for the uptick.

  • "The states that have the lowest vaccine rates are the states that we have outbreaks and the states where we have people overwhelming the hospital system. There's a clear and direct correlation. It's not a confusing picture," Dr. Roberta DeBiasi, chief of infectious diseases at Children’s National Hospital in D.C. told Axios.

Reality check: But they worry the level of pediatric hospitalizations may also be due to the Delta variant being more virulent in kids than previous variants.

  • "I do think we're seeing more severe disease and I think part of that is because the kids we're seeing don't have underlying medical conditions," Kenneth Alexander, infectious diseases division chief for Nemours Children's in Orlando told Axios.
  • The hospital has eight or nine children hospitalized with COVID, including two in the ICU. Last summer, the hospital might've had one or two.
  • “Everybody is a little bit nervous about the possibility that the Delta variant could, in fact, be, in some way, more dangerous in kids,” Richard Malley, a pediatric infectious disease specialist at Boston Children’s Hospital, told the New York Times.
  • But there's still some debate on the matter. DeBiasi said the data hasn't shown an uptick in rates of serious illness among kids in D.C. "It's really remarkable. The entire time, it's been the exact same percentage who've been hospitalized and the exact same percentage who've been critically ill. We've not seen a change even though the type or variant of virus has changed," DeBiasi said.

Zoom out: Kids of different ages are often impacted differently by COVID, and specifically the Delta variant.

  • Teens and children younger than 1 have seemed more likely to be hospitalized, the doctors said.
  • Kids who are obese, as well as kids who are Hispanic or Black seem to be at higher risk, but "we’ve had some very sick kids that don’t have risk factors," Alexander said.
  • Meanwhile, the rare condition associated with COVID-19 called Multisystem Inflammatory Syndrome in Children (MIS-C) peak median age of kids most commonly impacted are around age nine, DeBiasi said. The majority of those cases typically appeared within four to six weeks after each of the big waves of COVID, DeBiasi said.

Experts expect new surges to hit among kids and adults within the next two weeks of the return to school, particularly in states like Florida where mask mandates have been banned.

  • "As we flirt with the idea of not wearing masks, we're not only putting children in danger, we're putting their parents and grandparents in serious danger," Alexander said.

Bottom line: Experts say the concerning rise makes the case for both masks and vaccinations for kids in the Delta era.

  • "We have so much information now on millions and millions of people that have been vaccinated showing the efficacy of preventing severe disease," DeBiasi said. "Even though the virus has changed and the variants changed, that has been a consistent finding."

Go deeper

19 hours ago - World

U.S. releases updated vaccination, testing rules for foreign travelers

Photo: Patrick T. Fallon/AFP via Getty Images

Foreign travelers will be allowed entry to the U.S. beginning Nov. 8 if they can provide proof of full COVID-19 vaccination with a shot authorized by the World Health Organization and a negative test within three days of departure, the White House announced Monday.

Why it matters: The updated guidance, which exempts children under the age of 18 from the vaccine requirement, is intended to provide further clarity for airlines and foreign nationals who have been restricted from traveling to the U.S. since early 2020.

10 hours ago - Health

New York City police union files lawsuit against vaccine mandate

Combination images of New York City Patrolman Benevolent Association President Patrick Lynch and New York City Mayor Bill de Blasio. Photo: Andrew Lichtenstein/Corbis via Getty Images/David Dee Delgado/Getty Images

New York City's biggest police union filed a lawsuit Monday against Mayor Bill de Blasio's COVID-19 vaccine requirement for all NYC public employees.

Why it matters: The mandate requires all city employees to have had at least one dose by this Friday. They must show proof of vaccination or they'll be placed on unpaid leave. The Police Benevolent Association of New York tweeted Monday that it's seeking a temporary restraining order to halt the mandate, pending the outcome of its lawsuit.

Oct 25, 2021 - Health

DeSantis touts bonuses for unvaccinated police who relocate to Florida

Florida Gov. Ron DeSantis speaks during a press conference Friday in Kissimmee, Fla. Photo: Paul Hennessy/SOPA Images/LightRocket via Getty Images

Gov. Ron DeSantis announced plans Sunday to "hopefully sign" legislation to provide a $5,000 bonus to police officers who relocate to Florida in order to avoid COVID-19 vaccine mandates.

Why it matters: The governor's pledge during an appearance on Fox News comes amid escalating tensions with the Biden administration over its upcoming vaccine requirement for federal workers.