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  1. Jul 21, 2021 · The B.1.617.2 (delta) variant of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus that causes coronavirus disease 2019 (Covid-19), has contributed to a surge in cases in ...

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  3. The delta variant is concerning because it's more highly transmissible, but the good news is that the COVID-19 vaccine is still highly protective against getting infected or ending up in a hospital or dying from the infection. Breakthrough infection is a rare event where someone who is fully vaccinated still ends up getting infected with COVID-19.

    • The Pfizer-Biontech Covid-19 Vaccine
    • The Moderna Covid-19 Vaccine
    • The Johnson & Johnson Covid-19 Vaccine

    Due to limited research so far, trying to determine the effectiveness of each vaccine against the Delta variant remains a challenge. However, there have been promising results from multiple studies.

    Many lab studies and real-life data suggest the Moderna COVID-19 vaccine works against the Delta variant.

    There’s little data that shows how effective the Johnson & Johnson (J&J) single-shot COVID-19 vaccine is at protecting against the Delta variant.

  4. Aug 20, 2021 · According to new data from a large clinical trial, the Johnson & Johnson COVID-19 vaccine is up to 71% percent effective against hospitalization and 96% percent effective against death from the Delta variant. The clinical trial is the first real-world test of the vaccine’s efficacy against the highly transmissible variant.

    • Carla Delgado
  5. Aug 20, 2021 · The vaccines did appear to lose some of their effectiveness in preventing any kind of illness as the delta variant became dominant, especially for people who are at highest risk from Covid-19.

  6. Nov 10, 2021 · Lopez Bernal et al. present an incomplete picture of the Covid-19 vaccine effectiveness against the delta variant. In the technical briefing by Public Health England, dated July 23, 2021, it was ...

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