The FDA’s Vaccines and Related Biological Products Advisory Committee (VRBPAC) voted 17-0, with one abstention, that the benefits of Pfizer Inc.-Biontech SE pediatric formulation of its two-dose COVID-19 vaccine outweigh its risks for children ages 5 through 11. Many of those votes came with caveats, as the VRBPAC members struggled with the unknowns of the vaccine and the fear that schools would mandate its use, even though it would still be considered experimental if the FDA grants it an emergency use authorization.

LONDON – A U.K. study following up 32.5 million people for 28 days after their first dose of a COVID-19 vaccine has shown an increased risk of hemorrhagic stroke after receiving the Pfizer Inc./Biontech SE product, and confirmed case reports of an increased risk of developing Guillain-Barré syndrome after the Astrazeneca plc vaccine.

Pfizer Inc. said that, in children aged 5 through 11, the COVID-19 vaccine it co-developed with Biontech SE showed 90.7% efficacy against all variants of concern following two doses. The data were included in briefing documents filed ahead of a full discussion at the FDA’s Vaccines and Related Biological Products advisory committee meeting set for Oct. 26.

Shares of Ultimovacs ASA (OSE:ULTI) climbed 16.6% to NOK148.60 (US$17.82) on news the FDA will expedite an eventual review of its investigational cancer vaccine, UV-1, in combination with checkpoint inhibitors for the potential treatment of unresectable or metastatic melanoma.

Despite some concerns from a few members, the Advisory Committee on Immunization Practices unanimously approved recommendations to the CDC that boosters be made available to those wanting them. The advisory committee recommended that a single COVID-19 vaccine booster dose be given six months or more after completing an mRNA primary series in the same risk group for whom the CDC recommended a booster dose of Pfizer Inc-Biontech SA’s vaccine. The CDC presented data to the committee that the single mRNA COVID-19 vaccine dose be given to those age 65 and older, for those at least 18 years old and reside in long-term-care settings, and also for those ages 50 to 60 with certain underlying medical conditions.

As largely expected, the FDA on Oct. 20 authorized the use of booster doses for COVID-19 vaccines from Moderna Inc. and Johnson & Johnson, in line with last week’s Vaccines and Related Biological Products Advisory Committee (VRBPAC) meetings. It also cleared the way for “mix-and-match” boosters, allowing eligible people to receive boosters from any of the FDA-approved vaccines, regardless of which vaccine they received originally.

Baidu Inc.’s preclinical studies showed the mRNA vaccine sequences for COVID-19 designed using its Lineardesign algorithm outperformed the benchmark sequences designed by traditional algorithms in terms of stability, protein expression and immunogenicity. The firm teamed up with Stemirna Therapeutics Co. Ltd., which specializes in the R&D of mRNA vaccines and drugs, to test seven mRNA COVID-19 vaccine sequences designed using Lineardesign.