Scientists on Monday (Nov 9) said initial trial results for Pfizer Inc and BioNTech's coronavirus vaccine far outpaced their expectations for protection against a completely new disease, but that many questions remain unanswered.<br /><br />The drugmakers said their vaccine was more than 90 percent effective at preventing COVID-19, based on data from the first 94 people in the trial to become infected with the coronavirus.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline