The 21st-century data revolution provides exciting opportunities for enhancing understanding of the world in virtually every area of human activity. However, the process of moving from data to scientific understanding is often challenging.

The 2021 Bayes4Health workshop took place in Cambridge, UK, from Tuesday 14^th to Thursday 16^th September. The workshop covered research ranging from statistical methods for Covid-19 and applications of statistics to health more generally, to recent advances in Bayesian and computational statistics.