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Moderna Announces Strategy to Address Omicron (B.1.1.529) SARS-CoV-2 Variant

Moderna, Inc., (Nasdaq: MRNA) a biotechnology company pioneering messenger RNA (mRNA) therapeutics and vaccines, today announced updates to its strategy to address SARS-CoV-2 variants of concern, given the emergence of the B.1.1.529 (Omicron) variant.

The recently described Omicron variant includes mutations seen in the Delta variant that are believed to increase transmissibility and mutations seen in the Beta and Delta variants that are believed to promote immune escape. The combination of mutations represents a significant potential risk to accelerate the waning of natural and vaccine-induced immunity. A booster dose of an authorized vaccine represents the only currently available strategy for boosting waning immunity. The Moderna COVID-19 vaccine (mRNA-1273) is authorized as a booster for many populations at the 50 µg dose level. The Company is working rapidly to test the ability of the current vaccine dose to neutralize the Omicron variant and data is expected in the coming weeks.

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Since early 2021, Moderna has advanced a comprehensive strategy to anticipate new variants of concern. This strategy includes three levels of response should the currently authorized 50 µg booster dose of mRNA-1273 prove insufficient to boost waning immunity against the Omicron variant.

First, Moderna has already tested a higher dose booster of mRNA-1273 (100 µg) in healthy adults. Moderna has completed dosing of 306 participants in a safety and immunogenicity study of this high dose (100 µg) booster. The 100 µg dose of mRNA-1273 has also recently been studied by the National Institutes of Health (NIH) in the U.S. and has generally resulted in the highest neutralizing titers against prior SARS-CoV-2 strains. Moderna is working to rapidly test sera from its high dose booster recipients in neutralizing assays to determine if the 100 µg dose provides superior neutralizing protection against Omicron.

Second, Moderna is already studying two multi-valent booster candidates in the clinic that were designed to anticipate mutations such as those that have emerged in the Omicron variant. The first candidate (mRNA-1273.211) includes several mutations present in the Omicron variant that were also present in the Beta variant of concern1. The Company has completed dosing in a potentially pivotal safety and immunogenicity study of mRNA-1273.211 at the 50 µg (N=300) and 100 µg (N=584) dose levels. A second multi-valent candidate (mRNA-1273.213) includes many of the mutations present in the Omicron variant that were also present in the Beta and Delta variants2. The Company has completed dosing at the 100 µg (N=584) dose level and also plans to explore the 50 µg dose level in approximately 584 participants. Moderna will rapidly expand testing of sera from completed and ongoing multi-valent booster studies to determine if these multi-valent candidates are able to provide superior neutralizing protection against Omicron.

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Nachrichtenquelle: Business Wire (engl.)
26.11.2021, 21:31  |  189   |   |   

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Moderna Announces Strategy to Address Omicron (B.1.1.529) SARS-CoV-2 Variant Moderna, Inc., (Nasdaq: MRNA) a biotechnology company pioneering messenger RNA (mRNA) therapeutics and vaccines, today announced updates to its strategy to address SARS-CoV-2 variants of concern, given the emergence of the B.1.1.529 (Omicron) …

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