While the deaths of elderly people who had received the Pfizer vaccine in Norway has dominated the headlines, it's worth taking a step back and taking a broader look of the worldwide rollout to date. Millions and millions of doses of the Pfizer vaccine have now been given to people around the world, and scientists have been monitoring to see if any rarer side effects are popping up. That's because it sometimes takes larger numbers of people receiving a new drug before you can see if there are any one in a million events. So on today's Coronacast, what have we learned so far from the Pfizer vaccine rollout around the world? And what could it mean for the other first generation coronavirus vaccines? Also on today's show: * When you get the vaccine, how long does it take to afford protection? Hours? Days? Weeks? * Could the fall in the NSW COVID-19 testing numbers reflect the fact that greater Sydney is now subject to mandatory mask wearing resulting in fewer people getting even mild cold symptoms?