Martin Robbins, of the Guardian's Lay Science blog, reports on dangerous pseudo-medical practices outside the Western world, from homeopaths in East Africa to flat earthers and anti-vaccine campaigns in Nigeria.

As part of this talk, Martin will be showing video clips of his recent visits to homeopathic projects in Kenya, Uganda and Tanzania, shot for a film he is making with Michael Story, with support from the Wellcome Trust.

Martin Robbins is a writer, podcaster and journalist covering science, pseudoscience and evidence-based politics. Besides the Guardian, he has written for the Times, the Telegraph, the Independent and New Scientist. He also hosts the Strange Quarks podcast with Michael Marshall.

http://www.guardian.co.uk/layscience