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Pfizer says COVID-19 vaccine works in kids ages 5 to 11, will seek authorization

 A 5-year-old in a hospital bed with equipment nearby and a tube connected to his nose
A 5-year-old COVID-19 patient is in the acute care unit at Loma Linda University Children’s Hospital in Loma Linda last week. Pfizer said Monday its COVID-19 vaccine works for children ages 5 to 11 and that it will seek U.S. authorization for this age group.
(Francine Orr / Los Angeles Times)

Pfizer said Monday that its COVID-19 vaccine works for children ages 5 to 11 and that it will seek U.S. authorization for this age group soon — a key step toward beginning vaccinations for youngsters.

The vaccine made by Pfizer and its German partner BioNTech already is available for anyone 12 and older. But with kids now back in school and the extra-contagious Delta variant causing a huge jump in pediatric infections, many parents are anxiously awaiting vaccinations for their younger children.

For elementary school-age kids, Pfizer tested a much lower dose — a third of the amount that’s in each shot given now. Yet after their second dose, children ages 5 to 11 developed coronavirus-fighting antibody levels just as strong as teenagers and young adults, Dr. Bill Gruber, a Pfizer senior vice president, told the Associated Press.

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A boy in a hospital bed with a tube connected to his nose
A 5-year-old COVID-19 patient in the acute care unit at Loma Linda University Children’s Hospital in Loma Linda last week.
(Francine Orr/Los Angeles Times)

The kid dosage also proved safe, with similar or fewer temporary side effects — such as sore arms, fever or achiness — that teens experience, he said.

“I think we really hit the sweet spot,” said Gruber, who is also a pediatrician.

Gruber said the companies aim to apply to the Food and Drug Administration by the end of the month for emergency use in this age group, followed shortly afterward with applications to European and British regulators.

In the five states with the lowest levels of vaccination, the COVID-19 death rate this summer was more than triple the rate in the five states where vaccination is most common.

This month, FDA chief Dr. Peter Marks told the AP that once Pfizer turns over its study results, his agency would evaluate the data “hopefully in a matter of weeks” to decide if the shots are safe and effective enough for younger kids.

Many Western countries so far have vaccinated children no younger than age 12, awaiting evidence of what is the right dose and that it works safely in smaller tots. But Cuba last week began immunizing children as young as 2 with its homegrown vaccines, and Chinese regulators have cleared two of its brands down to age 3.

Although kids are at lower risk of severe illness or death than older people, more than 5 million children in the U.S. have tested positive for the coronavirus since the pandemic began and at least 460 have died, according to the American Academy of Pediatrics. Cases in children have risen dramatically as the Delta variant swept through the country.

“I feel a great sense of urgency” in making the vaccine available to children under 12, Gruber said. “There’s pent-up demand for parents to be able to have their children returned to a normal life.”

In New Jersey, 10-year-old Maya Huber asked why she couldn’t get vaccinated like her parents and both teen brothers have. Her mother, Dr. Nisha Gandhi, a critical care physician at Englewood Hospital, enrolled Maya in the Pfizer study at Rutgers University. But the family hasn’t eased up on their masking and other virus precautions until they learn whether Maya received the real vaccine or a dummy shot.

Once she knows she’s protected, Maya’s first goal: “a huge sleepover with all my friends.”

More and more babies in L.A. County have been infected with syphilis in the womb, which can lead to stillbirth, neurological problems, blindness and other conditions.

Maya said it was exciting to be part of the study even though she was “super scared” about getting jabbed. But “after you get it, at least you feel like happy that you did it and relieved that it didn’t hurt,” she said.

Pfizer said it studied the lower dose in 2,268 kindergartners and elementary school-age kids. The FDA required what is called an immune “bridging” study: evidence that the younger children developed antibody levels already proved to be protective in teens and adults. That’s what Pfizer reported Monday in a news release, not a scientific publication. The study still is ongoing, and there haven’t yet been enough coronavirus cases to compare rates between the vaccinated and those given a placebo — something that might offer additional evidence.

The study isn’t large enough to detect any extremely rare side effects, such as the heart inflammation that sometimes occurs after the second dose, mostly in young men. The FDA’s Marks said the pediatric studies should be large enough to rule out any higher risk to young children. Pfizer’s Gruber said once the vaccine is authorized for younger children, they’ll be carefully monitored for rare risks just like everyone else.

A second U.S. vaccine maker, Moderna, also is studying its shots in elementary school-age children. Pfizer and Moderna are studying even younger tots as well, down to 6-month-olds. Results are expected later in the year.

AP journalist Emma Tobin contributed to this report.

The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content.


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