14-10-2021, 08:43 PM
After so long and for so many months, many people here still cannot understand and differentiate what is vaccine efficacy, vaccine effectiveness, symptomatic & asymptomatic patients. They are still treating every vaccinated person who tested positive as a symptomatic patient. They are expecting and demanding 95% protection if the vaccinated are using Pfizer or Moderna. They are also expecting Pfizer to give 95% protection when Delta is more vicious and infectious than Alpha which was used to work out the 95% vaccine efficacy
Quote:The efficacy of Pfizer-BioNTech/ Comirnaty and Moderna COVID-19 vaccines were shown to be about 95% in preventing symptomatic and severe disease. That means that some vaccinated persons may still be vulnerable to infection.
https://www.moh.gov.sg/covid-19/vaccinat...19-vaccine