Covid-19 vaccine trials

Chinese Covid-19 vaccine 'successful in mid-stage trials'

There are several vaccines being developed in China, some of which are already being administered.

According to the researchers, the Sinovac Biotech vaccine led to a quick immune response during trials with around 700 people.

The announcement comes after European and US vaccines reported successful data from large late-stage trials.

Three vaccines, developed in the US, Germany and Russia, have all released data suggesting efficiency of more than 90%, after trials with tens of thousands of people.

What do we know about the vaccine?