Additional human beings add to our economic capacity rather than diminishing it, say Marian L. Tupy and Gale Pooley.
Jessica Flanigan argues that human challenge trials can work well under real-world conditions.
Ben Bramble argues that challenge trials conflict with the virtuous, well-lived life.
Jessica Flanigan replies to Ben Bramble on the ethics of human challenge trials.
Charles Weijer dissents sharply on the question of human challenge trials for COVID-19.