How sick viruses make us or how effective vaccinations are probably also depends on the time of day. We know that about our immune clock.

Maybe you will hear them in the future, sentences like: “I should have caught it in the morning.” Or: “Vaccinations are only given between eight and twelve.” They still sound very unusual – and yet there is something to the idea. Because: Infections and their defense are obviously also a question of the time of day. The work of the immune system is controlled by a kind of internal clock.