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  1. Jul 21, 2021 · Effectiveness after one dose of vaccine (BNT162b2 or ChAdOx1 nCoV-19) was notably lower among persons with the delta variant (30.7%; 95% confidence interval [CI], 25.2 to 35.7) than among...

    • 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.

  2. Aug 19, 2021 · The Pfizer–BioNTech and Oxford–AstraZeneca COVID-19 vaccines are effective against the highly infectious Delta variant of SARS-CoV-2 — but their protection drops away over time, a study...

    • Katharine Sanderson
    • 2021
  3. Jan 5, 2022 · Vaccine-associated reductions in transmission of the delta variant were smaller than those with the alpha variant, and reductions in transmission of the delta variant after two BNT162b2...

  4. Dec 25, 2021 · Meta-analysis of 2,375,957 vaccinated cases showed that the Pfizer-BioNTech vaccine had the highest VE against the infection after the second dose, at 0.837 (95% CI 0.672–0.928), and third dose, at 0.972 (95% CI 0.96–0.978), as well as the highest VE for the prevention of severe infection or death, at 0.985 (95% CI 0.95–0.99), amongst all COVID-...

    • 10.3390/vaccines10010023
    • 2022/01
    • Vaccines (Basel). 2022 Jan; 10(1): 23.
  5. Jul 13, 2021 · A full course of the Pfizer-BioNTech vaccine is 64% effective at preventing infection and 64% at preventing symptomatic Covid-19 caused by the Delta variant, according to preliminary findings...

  6. Aug 26, 2021 · During December 14, 2020–April 10, 2021, data from the HEROES-RECOVER Cohorts,* a network of prospective cohorts among frontline workers, showed that the Pfizer-BioNTech and Moderna mRNA COVID-19 vaccines were approximately 90% effective in preventing symptomatic and asymptomatic infection with SARS-CoV-2, the virus that causes COVID-19, in real...

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