Health Our World Covid vaccine: First vaccine offers 90% protectionsatofsatNovember 9, 2020November 9, 2020 by satofsatNovember 9, 2020November 9, 20200637 Pfizer and BioNTech, the developers of the first effective coronavirus vaccine can prevent more than 90% of people from getting Covid-19 described the achievement as... Read more