moderna inc. says its trial drug is 94% effective. news that has generated excitement around the world. it means the u.s. could have a second vaccine for emergency use this december with the u.k. also putting in an order and with the european union already locked in talks with the pharmaceutical company. catherine brings us more. >> raising the bar to a new level. moderna inc. announces that it's covid vaccine is almost 95% effective based on a late stage clinical trial with 30,000 participants. the laboratory's president said encouraging, much work remains to bdone. >> it was great news, we still need to complete the regulatory process which means completing the study, generating more data, follow-up safety data and then we need to get busy manufacturing. >> the company hopes to produce 20 million doses by the end of this year and is aiming to make between 500 million and a billion doses by next year. the eu commission described the news as encouraging on twitter. they hope to begin distributing