Chief scientific adviser Sir Patrick Vallance speaks during a virtual news conference on the ongoing situation with the coronavirus disease, at Downing Street, London, September 9, 2020. Stefan Rousseau/Pool via REUTERS

Other Covid-19 vaccine trials are likely to be paused at some point, government’s chief scientific adviser Patrick Vallance, said, describing a pause in the trial of an AstraZeneca vaccine as “not good” but a sensible step.

“I think you should expect in some of the other trials that you will see situations where things are paused and then restarted,” Vallance told a news conference on Wednesday (September 9).

“We need to make sure with these vaccines that they work, they work well enough, and they are safe,” he added.

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