Changes to virus taxonomy (the universal scheme of virus classification of the International Committee on Taxonomy of Viruses [ICTV]) take place annually and are the result of a multi-stage process. In accordance with the ICTV Statutes (http://ictv.global/statutes.asp), proposals submitted to the ICTV Executive Committee (EC) undergo a review process that involves input from the ICTV Study Groups (SGs) and Subcommittees (SCs), other interested virologists, and the EC. After final approval by the EC, proposals are presented for ratification to the full ICTV membership by publication on the ICTV website (http://ictv.global) followed by an electronic vote.
Nine proposals that were discussed at the EC meeting in July 2017 (Singapore) and subsequently at the EC meeting in July 2018 (Washington, DC, USA) [1,2,3,4,5,6,7,8,9] were approved by the EC and then ratified in a supplemental vote. The proposals were made publicly available on the ICTV website in August 2018, and a list of them was then emailed on August 30, 2018 to the 156 members of ICTV, i.e., EC Members, Life Members, ICTV Subcommittee Members (including the SG chairs) and ICTV National Representatives. Following this, members were requested to vote on whether to ratify the proposals, with a closing date of October 7, 2018. Since the processing of these proposals overlapped the end of the 2014–2017 EC tenure and the start of the 2017–2020 EC tenure, members of both ECs constitute the authorship of this article.