Explainer: Battle against Coronavirus

Some drugmakers are expected to begin vaccine tests on humans, possibly within three months.

Researchers around the world are racing to find a vaccine for the coronavirus.

At the moment, there is no vaccine or known cure for this new virus.

What we do know is that it most likely passed from animals to humans in a market, in the Chinese city of Wuhan.

And it is believed to have likely originated in bats.

Al Jazeera’s Nicola Gage takes a look at the progress researchers are making, which is taking place at record speed.