A human trial of a vaccine against coronavirus in the US has been given a dose to its first participant.
This is the first of a group of 45 healthy volunteers to be given the jab, at the Kaiser Permanente research facility, in Seattle.
Each volunteer will receive an injection over a six-week time frame.
"The first participant received the investigational vaccine today," the US National Institutes of Health (NIH) said in a statement on Monday.
Experts say it will still take many months to know if this vaccine, or others also in research, will work.
