Novavax, Inc. announced that the Taiwan Food and Drug Administration (TFDA) has granted expanded emergency use authorization (EUA) for Nuvaxovid™ (NVX-CoV2373) COVID-19 vaccine for active immunization to prevent coronavirus disease 2019 (COVID-19) caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in adolescents aged 12 through 17. The EUA is based on data from the ongoing pediatric expansion of the Phase 3 PREVENT-19 trial of 2,247 adolescents aged 12 through 17 years across 75 sites in the U.S., to evaluate the safety and effectiveness of Nuvaxovid. In the pediatric expansion, Nuvaxovid achieved its primary efficacy endpoint with clinical efficacy of 78.29% (95% CI: 37.55%, 92.45%) overall at a time when the Delta variant was the predominant circulating SARS-CoV-2 strain in the U.S. The efficacy analysis was supported by assessment of antibody titers that were shown to be higher in adolescents than in young adults.

Preliminary safety data from the pediatric expansion showed the vaccine to be generally well-tolerated. Serious and severe adverse reactions (AR) were low in number and balanced between vaccine and placebo groups, and not considered related to the vaccine. Local and systemic reactogenicity was generally lower than or similar to adults, after the first and second dose.

Among participants 12 through 17 years of age, solicited ARs following administration of any dose of the vaccine were injection site pain/tenderness (75.0%), headache (56.9%), fatigue/malaise (57.9%), muscle pain (49.0%), nausea/vomiting (19.9%), joint pain (16.2%), fever (16.9%), injection site swelling (8.0%), and injection site redness (7.5%). Most were mild-to-moderate in severity and lasted less than two days. No new safety signal was observed through the placebo-controlled portion of the pediatric expansion.

In the 12 through 17-year-old population, the vaccine has been authorized in more than 10 markets including the U.S., the European Union, and the United Kingdom (U.K.). The TFDA previously granted EUA for Nuvaxovid to prevent COVID-19 in adults aged 18 and older in June 2022.