AUTHOR=Henry Kevin A. , MacKenzie C. Roger TITLE=Editorial: Single-Domain Antibodies—Biology, Engineering and Emerging Applications JOURNAL=Frontiers in Immunology VOLUME=9 YEAR=2018 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2018.00041 DOI=10.3389/fimmu.2018.00041 ISSN=1664-3224