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They have trialled variant specific vaccines for both Delta and Omicron. It turned out that the original vaccine is as effective for Delta, so that work was she

They have trialled variant specific vaccines for both Delta and Omicron. It turned out that the original vaccine is as effective for Delta, so that work was shelved. Omicron, on the other hand, seems to be evading the immunity created by the Alpha vaccine, so they are actually planning to start producing an Omicron specific booster (or more correctly Alpha+Omicron) after FDA approval.

dragonwriter 5y ago
> They have trialled variant specific vaccines for both Delta and Omicron. It turned out that the original vaccine is as effective for Delta, so that work was shelved. No, it wasn't; in fact, the Pfizer-BioNtech Omicron variant-specifc vaccine and booster trial was announced only a week ago, while Novavax plans to begin testing an Omicron-specific vaccine imminently. https://www.pfizer.com/news/press-release/press-release-detail/pfizer-and-biontech-initiate-study-evaluate-omicron-based https://www.pfizer.com/news/press-release/press-release-deta... https://ir.novavax.com/2021-12-22-Novavax-Announces-Initial-Omicron-Cross-Reactivity-Data-from-COVID-19-Vaccine-Booster-and-Adolescent-Studies https://ir.novavax.com/2021-12-22-Novavax-Announces-Initial-...
- selcuka 5y ago
  > No, it wasn't I said "for Delta". If you read the rest of my comment I mentioned the upcoming Omicron vaccine too.
  - dragonwriter 5y ago
    > said "for Delta". You said, well, exactly what I quoted, which was that variant-specific vaccines for Delta and Omicron were tried, found less effective than the the existing vaccines, and abandoned. That is false. > I mentioned the upcoming Omicron vaccine too. No, you said that after abandoning Delta/Omicron variant-specific vaccines, “they” decided to work on mixed Omicron/Alpha boosters. That is also false. Novavax is planning to trial Omicron-specific vaccine. Pfizer is trialing Omicron specific vaccines, both as sole vaccines and as boosters after existing vaccines. Moderna is, I think, working on an Omicron-specific booster-only (after existing vaccines) approach.
    - comp_throw7 5y ago
      > which was that variant-specific vaccines for Delta and Omicron were tried, found less effective than the the existing vaccines, and abandoned > It turned out that the original vaccine is as effective for Delta, so that work was shelved. Omicron, on the other hand, seems to be evading the immunity created by the Alpha vaccine, so they are actually planning to start producing an Omicron specific booster (or more correctly Alpha+Omicron) after FDA approval. ??????????? The thing he said may not have been strictly accurate but your claim about what he said is much less accurate than that.

dragonwriter 5y ago

> They have trialled variant specific vaccines for both Delta and Omicron. It turned out that the original vaccine is as effective for Delta, so that work was shelved. No, it wasn't; in fact, the Pfizer-BioNtech Omicron variant-specifc vaccine and booster trial was announced only a week ago, while Novavax plans to begin testing an Omicron-specific vaccine imminently. https://www.pfizer.com/news/press-release/press-release-detail/pfizer-and-biontech-initiate-study-evaluate-omicron-based https://www.pfizer.com/news/press-release/press-release-deta... https://ir.novavax.com/2021-12-22-Novavax-Announces-Initial-Omicron-Cross-Reactivity-Data-from-COVID-19-Vaccine-Booster-and-Adolescent-Studies https://ir.novavax.com/2021-12-22-Novavax-Announces-Initial-...

selcuka 5y ago
> No, it wasn't I said "for Delta". If you read the rest of my comment I mentioned the upcoming Omicron vaccine too.
- dragonwriter 5y ago
  > said "for Delta". You said, well, exactly what I quoted, which was that variant-specific vaccines for Delta and Omicron were tried, found less effective than the the existing vaccines, and abandoned. That is false. > I mentioned the upcoming Omicron vaccine too. No, you said that after abandoning Delta/Omicron variant-specific vaccines, “they” decided to work on mixed Omicron/Alpha boosters. That is also false. Novavax is planning to trial Omicron-specific vaccine. Pfizer is trialing Omicron specific vaccines, both as sole vaccines and as boosters after existing vaccines. Moderna is, I think, working on an Omicron-specific booster-only (after existing vaccines) approach.
  - comp_throw7 5y ago
    > which was that variant-specific vaccines for Delta and Omicron were tried, found less effective than the the existing vaccines, and abandoned > It turned out that the original vaccine is as effective for Delta, so that work was shelved. Omicron, on the other hand, seems to be evading the immunity created by the Alpha vaccine, so they are actually planning to start producing an Omicron specific booster (or more correctly Alpha+Omicron) after FDA approval. ??????????? The thing he said may not have been strictly accurate but your claim about what he said is much less accurate than that.