US pharmaceutical giant Pfizer claims it has a COVID-19 vaccine candidate that is “more than 90 per cent effective” and could be produced before the end of the year. VideoImage COVID-19 vaccine could be ready by December Pfizer has released footage of a potential coronavirus vaccine rolling off the production line — as the drug giant aims to have 100 million doses ready by the end of the year. An independent data monitoring committee (DMC) analysed whether those people received the vaccine candidate or a placebo and found a vaccine efficiency rate of above 90 per cent. Further study will also seek to determine whether the vaccine is effective for people who have already caught the coronavirus before. “Is it 90 per cent effective at preventing the COVID-19 disease … is it 90 per cent effective at preventing transmission?