1 in 4 people have received a COVID-19 vaccine in high-income countries, but only 1 in 500 have in low-income countries (April 2021). A global strategy is needed to save lives, prevent mutations, and kickstart economic recovery.

But how willing are people in resource-rich countries to share? What makes them donate towards vaccines in times of adversity?

We study human behaviour at the confluence of altruism and self-interest to develop guidance for the design of a global vaccine strategy.