On this episode of Virus Watch we cover three Zika virus stories: the first human trial of a Zika virus vaccine, the first local transmission of infection in the United States, and whether the virus is a threat to participants in the 2016 Summer Olympic and Paralympic Games.

The first experimental Zika virus vaccine has been published, and in this episode of Virus Watch, I explain how it works – it’s a DNA vaccine – compared with all the other vaccines out there.