The announcements by two pharmaceutical companies that their vaccine candidates are highly effective in preventing Covid-19 is very good news. Moderna and Pfizer/BioNTech say their vaccines are over 90 per cent effective.
This is great news for a world that has been terrorised by the unrelenting coronavirus for the past one year. The world is being buffeted by a second wave of the virus that has infected 56 million people and claimed more than 1.3 million lives.