Figure 1. Vernix caseosa covers newborn infants

A newborn is often covered in a creamy white, cheesy biofilm called vernix caseosa. During the last trimester of gestation, this biofilm covers the skin of the fetus and after delivery, it dries. The boy pictured is Tristan Le Dévédec, son of Robert Rissmann, PhD, on whose thesis this review article is partly based. Reproduced with the kind permission of the father.