Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Infection Challenge Experiments in Nonhuman Primates: An Ethical Perspective

The coronavirus disease 2019 (COVID-19) pandemic has stimulated massive investment in biomedical research with the aims of understanding the disease and developing effective vaccine and therapeutic interventions. What role should animal research play in this scientific endeavor? Both the urgency to evaluate candidate interventions for human use and growing societal concern about ethical treatment of (nonhuman) animals put into question the justifiability of animal research as a precursor to clinical trials. Yet forgoing animal research in the rush to undertake human testing might expose human research participants to unacceptable risks. In this article, we apply a recently developed framework of principles for animal research ethics in exploring ethical questions raised by a severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection challenge experiment involving rhesus macaques, which evaluated the protective efficacy of the mRNA-1273 vaccine that was recently approved for emergency use. Our aim is to illuminate the ethical issues while introducing, and illustrating the use of, the framework.