The company said that if authorized, children would receive a primary series consisting of two doses of the original Pfizer-BioNTech Covid vaccine and one shot of the Omicron-optimized bivalent vaccine.
Bivalent COVID-19 vaccine, targeting parent strain and BA.4/BA.5 omicron subvariants, currently authorized in the United States and the European Union (EU) as a booster dose for ages 5 years and older Is.
Last month, a real-world study of more than 360,000 people in the US found updated bivalent boosters, including from rival Moderna Inc, offered increased protection against the new coronavirus subvariant in people who received up to four doses of the older vaccine.