20th Smögen Summer Symposium on Virology, August 24-26, 2023, which also this year has gathered excellent keynote speakers, including Emma Thomson, Glasgow, on hepatitis with unknown aetiology in children, Hugo Zeberg, Karolinska institutet, on gene flow from Neandertals impacting viral diseases, Gunilla Karlsson Hedestam, Karolinska Institutet, on antiviral responses and the impact of immunoglobulin germline variation, and Ralf Bartenschlager, Heidelberg, on molecular virology of HCV, as well as HBV, Flaviviruses and Coronaviruses. See link for more information.