A coronavirus vaccine developed by the UK's University of Oxford protects 70% of people, a large trial has shown.
The figure could be as high as 90% by tweaking the dose.
It comes after Pfizer and Moderna vaccines showed 95% protection. But the Oxford jab is far cheaper and easier to store - so could play a significant role in tackling the pandemic if approved for use by regulators.
Moderna's coronavirus vaccine could soon be part of America's largest mass vaccination effort. The Food and Drug Administration said the vaccine is highly effective and there are "no specific safety concerns," and a panel is expected to consider the pharmaceutical company's application for emergency use this week. This comes as distribution ramps up for Pfizer's vaccine and health care systems are stretched thin as coronavirus infections skyrocket. CBS News correspondent Mola Lenghi reports on the latest developments from New York City, CBS News chief congressional correspondent Nancy Cordes reports from Washington on the need for funding to fight COVID-19, and Dr. Richard Besser, president and CEO of the Robert Wood Johnson Foundation and the former acting director of the Centers for Disease Control and Prevention, joined CBSN to discuss. President Biden on COVID-19 and vaccine distribution: "I feel confident that by summer we're going to be well on our way to, heading toward, herd immunity." Exactly one year after the first case of COVID-19 was declared, the first vaccine against the virus will be administered.
People in vulnerable groups told Sky News that they are looking forward to "getting their lives back".
Staff at hospitals are receiving specific training in how to administer the vaccine in "hospital hubs". The Health Secretary said he felt 'emotional' watching the first person in the world get the COVID-19 vaccine.
Matt Hancock encouraged vulnerable people to 'trust the clinicians' and do 'what's 'good for you' and 'good for the country' by getting the vaccine.
He also said people do not need to carry vaccine reminder cards and said no immunity certificate or passport would be required.