2020: How years of trials, research were compressed into months in developing a Covid-19 vaccine Covid-19 Vaccine: Efforts by the scientific community across the world over the past few months have yielded at least two promising Covid-19 vaccines -- by Pfizer and Moderna Updated: December 23, 2020 7:59:00 pm Prime Minister Scott Morrison, pfizer Australia, BioNTech Australia, COVID-19 cases in Australia, Australia coronavirus cases, Australia latest news, Australia vaccination updates, world news, indian express world news.(Express File) Unprecedented and ...