Abstract

This essay clarifies the author’s objections to COVID-19 vaccine credentials voiced in “The Ethics of COVID-19 Vaccine Passports.” The author’s objections centered on discriminatory practices based on vaccine status for domestic social and work activities, but he agrees with the World Health Organization that these credentials should not be required for international travel. In addition, there is a significant ethical different between currently available COVID-19 vaccines and the yellow fever vaccine because the former are produced or tested using abortion-derived cell lines. The yellow fever vaccine is much less ethically problematic. This situation could change with the approval of new COVID-19 vaccines without links to abortion-derived cell lines.