Immunity credentials using self-sovereign identity for combating COVID-19 pandemic

The authors have plagiarized a substantial part of a paper that had already appeared in Digit. Gov. Res. Pract. 2, 2, Article 16 (December 2020) https://doi.org/10.1145/3429629. One of the conditions of submission of a paper for publication is that authors declare explicitly that their work is original and has not appeared in a publication elsewhere. Re-use of any data should be appropriately cited. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal