Image: Barbara Sixt, Eva-Maria Diehl, Copyright Barbara Sixt, The Laboratory for Molecular Infection Medicine Sweden, MIMS. The picture may only be used for information about the publication of Barbara Sixt in PLOS ONE: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0224324 corresponding author: barbara.sixt@umu.se