Children COVID Vaccine
Marisol Gerardo, 9, is held by her mother as she gets the second dose of the Pfizer COVID-19 vaccine during a clinical trial for children. Shawn Rocco/REUTERS

U.S. regulators authorized Pfizer COVID-19 vaccine for use in children as young as 12 and said they could begin receiving shots as soon as Thursday, widening the country’s inoculation program as vaccination rates have slowed significantly.

This is the first COVID-19 vaccine to be authorized in the United States for ages 12 to 15. Vaccinating younger ages is considered an important step for getting children back into schools safely. U.S. President Joe Biden has asked states to make the vaccine available to younger adolescents immediately.

Biden issued a statement hailing the authorization as “a promising development in our fight against the virus.”

“If you are a parent who wants to protect your child, or a teenager who is interested in getting vaccinated, today’s decision is a step closer to that goal,” he said.

The vaccine has been available under an emergency use authorization to people as young as 16 in the United States. The vaccine makers said they had started seeking full approval for the immunization in people 16 and older last week.

Peter Marks, director of the U.S. Food and Drug Administration’s Center for Biologics Evaluation and Research, told reporters that states will likely be able to begin vaccinating 12- to 15-year-olds after an advisory committee of the U.S. Centers for Disease Control and Prevention considers the expansion on Wednesday.

Most children with COVID-19 only develop mild symptoms or no symptoms at all. However, children are not without risk of becoming seriously ill, and they can still spread the virus. There have been outbreaks traced to sporting events and other activities for children in this age range.