Virus Structure: from Crick and Watson to recent conjectures

After a brief introduction to the world of viruses, we shall focus on the spherically shaped and we shall illustrate what is known about their icosahedral structure (theoretically posited by Crick and Watson already in 1956). Recent results on the fascinating modifications of the icosahedral structure for generic spherical membranes will finally be presented and questions on the relevance for virus structure will be raised.