Pfizer Says Covid-19 Vaccine Safe, Effective On Adolescents in Trial

Pfizer and BioNTech have announced that their Covid-19 vaccine is safe and effective in 12- to 15-year olds, paving the way for them to seek US emergency use authorization in weeks.

Pfizer hopes that vaccinations of the group could begin before the next school year, Albert Bourla, Pfizer’s chairman and chief executive, said in a statement.

Pfizer’s vaccine is already authorized for use in people starting at age 16. The new study offers the first evidence of how the vaccine will also work in school-age adolescents.

In the trial of 2,260 adolescents aged 12 to 15, there were 18 cases of Covid-19 in the group that got a placebo shot and none in the group that got the vaccine, resulting in 100% efficacy in preventing Covid-19, the companies said in a statement.

The vaccine was well tolerated, with side effects in line with those seen among those aged 16 to 25 in the adult trial. It did not list the side effects for the younger group, but the adult trial’s side effects generally were mild to moderate and included injection-site pain, headaches, fever and fatigue.

The companies also studied a subset of teens to measure the level of virus-neutralizing antibodies a month after the second dose and found it was comparable to study participants aged 16 to 25 in the pivotal trial in adults.

Bourla said the company planned to seek emergency authorization from the US Food and Drug Administration “in the coming weeks and to other regulators around the world, with the hope of starting to vaccinate this age group before the start of the next school year.”

Last week, the companies gave the first vaccine doses in a series of trials testing the vaccine in younger children, that will eventually go to those as young as 6 months of age.

Vaccinating children of all ages will be critical to stopping the pandemic — and helping schools, at least the upper grades, start to look a little more normal after months of disruption.

Results also are expected soon from a US study of Moderna’s vaccine in 12- to 17-year-olds. AstraZeneca last month began a study of its vaccine among 6- to 17-year-olds in Britain. Johnson & Johnson is planning its own pediatric studies. And in China, Sinovac recently announced it has submitted preliminary data to Chinese regulators showing its vaccine is safe in children as young as 3.

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