Professor Alex London, director of the Centre for Ethics and Policy at Carnegie Mellon University, joins us to discuss a number of ethical questions faced in conducting human research in and out of the pandemic. How do we define "acceptable risks" to trial participants? How can collaboration be improved? Why is politicisation of science dangerous and is there really a trade off to be made between speed and quality of research? We also dive into the benefits yet also pitfalls of diversity in scientific opinion.