What Actually Happens When You Are Sick?

Descripción

Offset your carbon footprint on Wren: ​https://www.wren.co/kurzgesagt. For the first 200 people who sign up, Kurzgesagt will pay for the first month of your subscription! This video was sponsored by Wren, thanks a lot for the support! Sources & further reading: https://sites.google.com/view/source