Will Covid-19 become an endemic, more agreeably mild virus that we just have to be wary of every winter, like the flu, or - as exemplified by the new XE variant - is this the coronavirus warming up for the main event? New Zealander Dr Andrew Read is at Pennsylvania State University. He's the director of its Institutes of Life Sciences and he specialises in the ways infectious diseases work, with expertise as well in how well vaccines cope with them. And he's working at the forefront of international research on Covid. Professor Read is back with us to cover off the latest Covid-19 developments.