Public health experts call the increase in vaccinations good, but the cause may be grim.
The rise in Covid-19 vaccinations among adolescents parallels an increase in Covid-19 cases and hospitalizations, mostly fueled by the Delta variant — leading some experts to speculate that parents who were once hesitant to get their children vaccinated are now reconsidering their decision after seeing more young people falling ill.
At the same time, that age group represented 30.9% of people receiving at least one dose of Covid-19 vaccine in June, rising to 38.9% in July and 44.9% in August. Children ages 12 to 15 account for just 5% of the population overall.
The share of fully vaccinated people who are ages 12 to 15 also saw an increase, climbing from 21.5% in June to 28.7% in July to 32.2% in August.
At the same time, that age group represented 43.5% of people receiving at least one dose of Covid-19 vaccine in June, rising to 49.7% in July and 54.2% in August. The share of fully vaccinated people who are in that age group climbed from 34.6% in June to 40.1% in July to 42.7% in August.
This means there are still millions of adolescents heading back to school this month unvaccinated, but they are a dwindling group within the roughly 25 million 12- to 17-year-olds in the United States.
‘They realize that it’s necessary to protect them’
Ishaan Mishra, 13, remembers being among some of the first US teenagers to wait in line at a local Walgreens in San Francisco for the vaccine in May. That month, the US Food and Drug Administration authorized the Pfizer/BioNTech coronavirus vaccine for adolescents as young as 12.
“We got it relatively early when it was released and there were definitely a few other teenagers, so people above the age of 12 there waiting in line, and I was overall definitely excited,” Ishaan told CNN on Tuesday, remembering the moment.
“It helped with my friends feeling safer interacting with me,” he said about getting vaccinated. “I’d get to see them more.”
Now, several months later, Ishaan will be starting 8th grade on September 1, and he said that many of his peers still have positive opinions about the Covid-19 vaccine.
“They realize that it’s necessary to protect them,” Ishaan said.
“I believe that it is very important to be vaccinated before the school year starts,” Ishaan said. “There’s always a possibility that you can get Covid-19 and you want to protect yourself as much as possible.”
Before taking Ishaan back to the pharmacy for his second dose, Gandhi said that she first waited until the June 23 ACIP meeting to hear the results of data reporting myocarditis cases in young males who had received the vaccine.
ACIP is the CDC’s Advisory Committee on Immunization Practices, a group of medical and public health experts that develop recommendations on how to use vaccines.
Vaccinations for 12- to 15-year-olds started out high soon after May 10, when the FDA authorized the two-dose Pfizer/BioNTech vaccine for that age group. In less than one week, 600,000 children in that group were vaccinated, according to data from the CDC.
But the numbers took a nosedive on May 23, the day after media articles appeared around the possible link to the vaccine and myocarditis, or inflammation of the heart, in young people. Most cases of myocarditis were mild and typically resolved quickly.
In June, the FDA added a warning about the risk of myocarditis and pericarditis, inflammation of the tissue surrounding the heart, to the fact sheets for both the Pfizer and Moderna vaccines.
The CDC data showing the myocarditis cases to be mild were reassuring, Gandhi said, and so she took Ishaan for his second shot in June, about six weeks after his first dose.
“We had a good experience,” she said, adding that Ishaan experienced only “mild side effects such as fatigue, arm soreness and mild fever after the second shot.”
What’s driving the increase in vaccinations?
Even though vaccinations among adolescents plunged following the myocarditis reports, data suggest vaccinations are now back on the rise.
“In my opinion, and from what I have seen amongst my teenage patients, many are eager to now get vaccinated because they understand the urgency of doing this before the school year starts,” said Dr. Priya Soni, assistant professor of pediatric infectious diseases at Cedars-Sinai Medical Center in Los Angeles.
“This reasoning, combined with the understanding that the Delta variant is propelling this pandemic into another surge, they are now more eager than ever to rely on what science has taught us time and time again: vaccines work,” Soni said. “Ultimately in weighing the pros and cons of starting the school year without the protection against Covid-19, many teens and parents are taking the plunge that sets them up for the best chance at a successful, healthy school year.”
Maldonado called the recent rise in Covid-19 vaccinations among adolescents “promising.”
“It is always encouraging to see populations seek the benefits of safe and effective vaccines for COVID-19 as well as for other infectious diseases. While we do still have a way to go to increase our vaccination numbers, this is a promising trend,” Maldonado said.
“I do think that the much anticipated reopening of schools is one factor that is encouraging families to get all of their eligible members to be vaccinated,” she said. “There is no evidence, however, that school openings are driving new COVID-19 infections. These are a reflection of the highly transmissible infections occurring among unvaccinated adults in community settings.”
The recent rise in Covid-19 cases and hospitalizations, fueled by the Delta coronavirus variant, appears to be driving vaccinations in younger people, Gandhi said.
“Yes, I think the Delta wave and the increasing concern regarding children safety, especially as schools re-open, is driving this willingness of parents to get their children vaccinated or the adolescents themselves,” said Gandhi, who also serves as director of the UCSF Center for AIDS Research.
“I think this is very encouraging as the group most lagging in vaccinations was younger individuals, including adolescents,” Gandhi said. “The Delta variant has made younger people getting vaccinated even more urgent and I think it is encouraging to see a full 20% of those who completed vaccinations in the last 14 days being adolescents.”
Ishaan, Gandhi’s 13-year-old son, hopes that more people in his age group who haven’t been vaccinated yet, roll up their sleeves soon.
“This is the most effective way of stopping the pandemic because masks, they work, but they can’t protect you from everything,” Ishaan said.
“The vaccine is generally like 94% effective,” he said. “So definitely, that is one of the best options you can get when trying to protect yourself and the community from Covid-19.”
CNN’s Deidre McPhillips contributed to this report.