U.S. drugmaker Pfizer should know in October if a COVID-19 vaccine it is developing works, Chief Executive Albert Bourla said on Thursday, potentially placing it at the centre of bitter U.S. presidential politics ahead of the Nov. 3 election. Pfizer would submit the candidate for approval immediately if data shows the vaccine, developed with partner, Germany’s BioNTech, proves safe and effective, Bourla said at an online briefing sponsored by drug industry group IFPMA. The race for vaccines with Moderna, AstraZeneca Plc, Johnson & Johnson, Sanofi and Chinese and Russian competitors comes as President Donald Trump seeks re-election, after committing billions of federal dollars to develop a vaccine to prevent COVID-19, which has killed more than 180,000 Americans.