Why Is the COVID Vaccine for Kids Taking So Long?

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Though many kids have been back in school for nearly two months, masked up and armed with loads of hand sanitizer, a major concern persists for parents and teachers: Children under the age of 12 still aren’t eligible to get vaccinated.

Trials of the vaccine in children began earlier this year, and Pfizer’s vaccine has been approved for use in kids between the ages of 12 and 15. But with the Delta variant driving record numbers of pediatric COVID-19 cases, many parents are anxious to know when they’ll be able to get shots for their kids — and why it’s taking so long.

Here’s what we know about when younger children will be able to get vaccinated.

Children age 12 to 15 are eligible to receive the Pfizer vaccine.

At the end of March, Pfizer reported that its trial of kids between ages 12 and 15 found the vaccine to be 100 percent effective, without any abnormal side effects among participants. In May, the FDA granted authorization for kids in this age group to receive the two-dose vaccine, which was quickly followed by CDC approval. So far, AAP has reported that only about 43 percent of kids between 12 and 17 are fully vaccinated, mainly due to vaccine hesitancy on the part of parents. Both the CDC and the American Academy of Pediatrics have confirmed that the vaccine is safe and recommend it for everyone over the age of 12.

One promising piece of news, though, is that it looks like adolescents may soon be able to receive the Moderna vaccine as well. Moderna is expected to be authorized for this age group any day now after announcing at the end of May that their vaccine was safe for children between 12 and 17. Meanwhile, Johnson & Johnson is currently in the middle of an adolescent trial that started in April.

Vaccines for children 5 to 11 could be available in the coming weeks.

Last month, Pfizer and BioNTech completed their revised trial, which found that a 10-microgram vaccine dosage was effective and safe for children between 5 and 11. On October 7, the companies officially submitted a request for emergency approval of the vaccine for children in this age group. The FDA has a meeting tentatively scheduled for October 26 to consider approval, and a decision is expected to come between Halloween and Thanksgiving. Meanwhile, according to NPR, Moderna is still testing the efficacy and safety of its vaccines for children under 12.

We probably won’t have vaccines for kids under 5 until 2022.

The studies for children under 5 have been delayed, which means those vaccines likely won’t be approved until 2022. A big factor that’s adding to the delay is figuring out what dose will be safe but effective in smaller bodies, which will respond faster to less vaccine. The FDA is also concerned about rare side effects like heart inflammation, which is why they asked both Pfizer and Moderna to expand their trials and track an extra four months of follow-up safety data to account for those issues, further delaying approval. Back in July, Pfizer said it expected to have trial results for children aged 5 to 11 in September, which it just announced. Results for children between 2 and 5 are expected “shortly after,” followed by kids between 6 months and 2 years old, which should arrive in October or November.

We need kids to be vaccinated to reach herd immunity.

In general, kids are a low-risk group for COVID, but it’s still important that they get vaccinated as soon as possible. Though most kids do not get very sick from COVID, some do, and they also can spread the virus. Now that the rapidly spreading Delta variant accounts for most COVID-19 cases in the U.S., large groups of unvaccinated kids are much more likely to infect each other. On top of that, pediatric hospitalizations for COVID-19 were higher in August than any other time this year. According to state-reported data, about one percent of children who are infected with COVID end up in the hospital, and .01 percent die.

To reach herd immunity — the point at which enough of the population is inoculated against the coronavirus to stop its spread — we need children, who make up a quarter of the U.S. population, to be vaccinated too. And even though many experts now say they don’t believe we’ll reach herd immunity in the U.S. because of vaccine hesitancy and highly transmissible variants, vaccinating kids is nevertheless crucial to stop the spread of COVID.

“It’s unlikely we could get community protection without immunizing children,” Drexel University pediatrics professor Dr. Sarah Long told the AP. “This is the lynchpin to getting everything back to some kind of normalcy.”

This post has been updated.

Why Is the COVID Vaccine for Kids Taking So Long?