Posted in Web Pfizer says COVID-19 vaccine is looking 90 per cent … November 14, 2020 Pfizer Inc. said Monday that its COVID-19 vaccine may be a remarkable 90% effective, based on early and incomplete test results that nevertheless brought a big burst of optimism to a world … https://www.ctvnews.ca/health/coronavirus/pfizer-says-covid-19-vaccine-is-looking-90-per-cent-effective-1.5180541