Please note: because we feel that the contents of this blog may be so important, we have decided to republish it including some small editing of the original, along with some additional text. All such text is shown in italics. In the last couple of weeks, several sources have suggested that levels of vitamin D may play a part in the host defence against the more severe consequences of infection with SARS-Cov-2 coronavirus. At first we thought this might only be a theoretical