That's good news, right?

But it's sadly, doesn't mean we can get the vaccine tomorrow.

This is a preliminary analysis from a Phase three trial on more evidence is needed about how safe and effective this vaccine is on.

Then regulators need to be convinced that it could meet quality standards before it can be given to more people before we get too carried away.

We really have to be careful about safety and scale around the vaccine.

So whilst we could go with confidence, I don't think we're seeing any return to normal by Christmas.

But the companies behind the vaccine that's fighter and Bio n tek.

They're going to apply for emergency approval to use the vaccine by the end of November.

We'll do our best.

We've been working day and night.

The clock never stops in our labs or offices, so we'll keep on with that momentum.

This vaccine will need to be given in two doses around three weeks apart, but storing it is going to be a big challenge.

It needs to be kept in ultra cold conditions at around minus 80 degrees Celsius.

That's a big challenge, but the companies believe they can supply 50 million doses by the end of this year on around 1.3 billion by the end of 2021.

It's important to say this is not the only covert 19 vaccine currently in development there, around a dozen at the same stage of testing on we could have others soon.

There's a kind of tendency that, well, when we get excited about these vaccines, is to think about vaccines as a sort of silver bullet on this cannot replace just the time and tested methods off track and trace monitoring the outbreak, changing our behavior so extremely exciting, very hopeful.

But let's not take our eye off the ball of the very basics of how we respond to health crisis.