Martin Gurri discusses trust and political polarization in the United States.
Jessica Flanigan says that human challenge trials can solve many problems in fighting this and future pandemics.
Ben Bramble argues that challenge trials would be less of a help against COVID-19 than we may suspect.
Charles Weijer dissents sharply on the question of human challenge trials for COVID-19.
Jessica Flanigan replies to Ben Bramble on the ethics of human challenge trials.