All cases now it seems traced back to the funeral of a "traditional healer" - and possibly a single zoonotic source (maybe). Over 300 mutations since this outbreak started. My fear is of this being as nasty as the medieval Black Deaths/plagues - which halved the population of Europe and might have killed 200 million - not least in that I am far from clear that pneumonic transmission can conclusively be ruled out and the survival period of the virus outside a host can be up to 50 days at 4 degrees Centigrade.