Science commentator Malvindar Singh-Bains joins Kathryn to look at how a common diabetes drug could be linked to slower cognitive decline and lower the dementia risk in Type-2 diabetics.

She also covers research into a case of a man who developed Parkinson’s symptoms after contracting Covid-19 – is it a link, or coincidence?

Malvindar Singh-Bains is a research fellow at the University of Auckland.