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  1. 10 lut 2023 · Our findings provide insights for clinicians, public health-care policy makers, and researchers about the long-term vaccine effectiveness of COVID-19 vaccines, which can inform clinical and policy recommendations, such as the timing of future booster doses.

  2. 14 lip 2021 · All COVID-19 vaccines approved by WHO for emergency use listing have been through randomized clinical trials to test their quality, safety and efficacy. To be approved, vaccines are required to have a high efficacy rate of 50% or above.

  3. 19 maj 2023 · mRNA-based vaccines against COVID-19 showed the highest total efficacy and effectiveness than other vaccines. In general, administering the second dose produced a more reliable response and higher effectiveness than a single dose.

  4. By the beginning of June 2021, almost 11% of the world’s population had received at least one dose of a coronavirus disease 2019 (COVID‐19) vaccine. 1 This represents an extraordinary scientific and logistic achievement — in 18 months, researchers, manufacturers and governments collaborated to produce and distribute vaccines that appear effectiv...

  5. 12 sty 2022 · Estimates of vaccine effectiveness in reducing the current risks of Covid-19 (Panel A), hospitalization due to severe Covid-19 (Panel B), and death due to Covid-19 (Panel C) are shown for...

  6. 2 mar 2022 · In this study, we estimated vaccine effectiveness against symptomatic disease caused by the delta and omicron variants after two doses (primary immunization) of BNT162b2, mRNA-1273, or ChAdOx1...

  7. 22 paź 2024 · Understanding COVID-19 vaccine effectiveness (VE) in preventing severe disease is critical to guide COVID-19 vaccine policy. While COVID-19 vaccines have been shown to be effective against severe disease, particularly in the first 3–6 months following vaccination, most studies that have evaluated VE against COVID-19 severe disease have occurred in high-income countries and have largely ...

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