OUR ANIMATIONS How anti COVID-19 vaccines workClient: Medicalfacts by Roberto Burioni The Krebs cycle of creativity Metabolic measurement Author: Gonçalo Brito How and why we get sun tanning Spermatogenesis: the timeline of human sperm developmentClient: Campion Fund A free radical attacking the DNAClient: Campion Fund Free radicals and particular matter cause inflammation in the lungClient: Campion Fund Neutrophils chasing bacteria Facing extinction ILLUSTRATIONS