Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Will our increasing understanding of virus-host interactions translate into a new generation of antiviral therapeutics or steer us toward an expensive journey to nowhere?