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My name is Charles Weijer (pronounced VEY-er). I am a bioethicist and professor at Western University in London, Canada who specializes in research ethics.


Together with an interdisciplinary team of colleagues and trainees, I explore ethical issues in randomized controlled trials, COVID-19 human challenge studies, and organ donation.

In the news


April 16, 2021

Would you risk your life to save others from a deadly virus?


March 23, 2021

COVID-19 trial infecting healthy volunteers needs full transparency, say campaigners


February 18, 2021

The UK is infecting people with COVID-19 for science. Is it worth it?


December 27, 2020

Ethics dumping: colonial thinking in science.

October 22, 2020

Vaccine trials need more transparency to enable scrutiny and earn public trust, say experts.

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June 15, 2020

Volunteers sign up to put their lives on the line for a coronavirus vaccine.

New publications

Upcoming and recent talks

Informed consent in cluster randomized trials:
a guide for the perplexed

Victorian Centre for Biostatistics, Australia

August 26, 2021

Is informed consent required in cluster randomized trials and, if so, when, from whom, and for what? In this talk, I outline a three-step approach for researchers and research ethics committees. It is the unit of intervention—not the unit of randomization—that drives informed consent issues in cluster randomized trials.