Australia just had its worst ever day in the fight against COVID-19.

Yesterday across the country, 502 new cases were confirmed, and in the past seven days there've been 2,414 new cases.

So in the face of what is increasingly looking like a second wave, how's that vaccine coming along?

Today on The Signal, we bring you good news, from two different places, on the race to find a vaccine.

Could one be less than a year away?

And if the virus mutates in the meantime, will a vaccine still work?

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Associate Professor Brian Oliver, Associate Head of School (Research), School of Life Sciences, University of Technology Sydney