Participants in an international survey study reported greater willingness to reshare a call for social distancing if the message was endorsed by well-known immunology expert Anthony Fauci, rather than a government spokesperson or celebrity. Ahmad Abu-Akel of the University of Lausanne, Switzerland, and colleagues Andreas Spitz and Robert West of the École Polytechnique Fédérale de Lausanne, report these findings in the open-access journal PLOS ONE on February 3.