Drugmakers Sanofi and GlaxoSmithKline announced Wednesday they are planning to ask regulators to authorize their new COVID-19 vaccine candidate.
FDA vaccine chief Dr. Peter Marks signaled to the New York Times that a fourth shot may be needed next fall, but he and other health officials stress there is still not enough data.The companies said data shows the shot works either as a primary vaccine, with 100% effectiveness against severe disease and hospitalization, or as a booster shot to raise antibody levels.
This is different from messenger RNA, or mRNA, technology, which is used by Pfizer and Moderna and teaches the body's cells how to make proteins that trigger immune responses.It's also different from Johnson & Johnson's vaccine, which is a viral vector vaccine and combines COVID genetic material with genes from the common cold-causing adenovirus to trigger an immune response.
The companies said their data from Phase 3 clinical trials showed two doses of their candidate, called VAT08, was 100% effective against severe disease and hospitalization from COVID-19, according to a company statement. Early data also indicated the vaccine was 77% effective against symptoms linked to the delta variant.
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