AUTHOR=Maher Carol , Singh Ben , Wylde Allison , Chastin Sebastien TITLE=Virtual health assistants: a grand challenge in health communications and behavior change JOURNAL=Frontiers in Digital Health VOLUME=6 YEAR=2024 URL=https://www.frontiersin.org/journals/digital-health/articles/10.3389/fdgth.2024.1418695 DOI=10.3389/fdgth.2024.1418695 ISSN=2673-253X