91热爆

Covid-19 infections are on the rise globally and the devastating impact of the pandemic is becoming clear. Scientists' hunt for a vaccine to protect us has become even more urgent. More than 150 possible vaccines are in development and there have been some promising results. But how long is it likely to take until one's widely available and is success guaranteed?

This content was created with funding from the Wellcome Trust.

Video journalist: Jack Burgess
Senior journalist: Katherine Campbell
Animation: James Mobbs
Voice: Marnie Chesterton

With thanks to Prof Jonathan Ball at the University of Nottingham.

(Image: A lab scientist studying Covid-19 Credit: 91热爆)