Medium General Knowledge GENERAL KNOWLEDGE FPSC Question Pfizer vaccine is how much effective? A 85% B 65% C 75% D 95% Submit Answer Try Again Explanation Explanation The Pfizer vaccine requires two doses, ideally 21 days apart. That being said, the vaccine has shown to have a high efficacy rate after a single dose, up to 85 percent , according to a 2021 study published in the Lancet. Show Explanation Previous MCQ All MCQs Next MCQ More MCQs in General Knowledge Medium Essam el hadary is the captain of which county’s National team in 2018? Essam el hadary is the captain of which county's National team in 2018? Medium What is the Lionel Messi’s nickname? What is the Lionel Messi's nickname? Medium Which of these is just another term for Goal keeper? Which of these is just another term for Goal keeper? Medium Who is the youngest person to ever play professional Football? Who is the youngest person to ever play professional Football?