identifying life-saving medications, tracking how the virus spreads and ultimately to preventing infection with vaccines.As a physician scientist, I study how the virus has evolved over the pandemic, since any changes in the virus could also change the effectiveness of current treatments.
On Nov. 9, Pfizer announced preliminary trial results showing that a vaccine it developed with BioNTech was about 90 per cent effective.
That was followed up nine days later with final trial results and two months of safety data, indicating a 95 per cent effectiveness rate.Pfizer announced on Nov.