Delta has quickly become the dominant COVID variant in many countries across the world, in this episode we ask why. Over the past few weeks, a slew of studies have started to shed more light on how the Delta variant differs from its cousins and even the mechanisms behind its rampant spread. We dig into studies on the epidemiology and molecular biology of Delta to ask some key questions surrounding its transmissibility, lethality and what all this might mean for vaccine roll outs.

News: The mutation that helps Delta spread like wildfire

News: COVID vaccines protect against Delta, but their effectiveness wanes

News: How do vaccinated people spread Delta? What the science says

News: Delta coronavirus variant: scientists brace for impact

News: Delta’s rise is fuelled by rampant spread from people who feel fine

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