Boris Johnson has praised 'world leading scientists' at Oxford University after early trials showed their vaccine triggers an immune response.Trials around 1,000 participants showed those injected with the vaccine produced antibodies and T-cells that can fight Covid-19.The Prime Minister hailed the 'very positive news' on Twitter on Monday afternoon.He said it was an 'important step in the right direction'."A huge well done to our brilliant, world-leading scientists and researchers at University of Oxford", he posted."There are no guarantees, we’re not there yet and further trials will be necessary - but this is an important step in the right direction."The results of the trial were published in medical journal The Lancet on Monday.It says:.
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