By now you have probably all heard about the new Ebola case in Sierra Leone:
This is devastating news since Sierra Leone has been Ebola-free for quite some time (last case Sep. 13, Bombali; last case in Kambia Sep. 9). Given that this appears to be a male case that came from the border region with Guinea (Kambia - although he died in Tonkolili) the question is whether this is a lingering transmission chain from Sierra Leone/Guinea or resurgence from a survivor (as has been observed in Liberia). I am leaning towards lingering transmission, since the last reported case was Oct. 29 in Forecariah, Guinea, which is <50 miles from Kambia and on the same main road. For sexual transmission the case would also likely have to be female.
It will be important to distinguish between the two scenarios since a lingering transmission chain would likely have several more cases, whereas survivor transmission could be limited to this single case. Does anybody have any additional information on this case? Sequencing information would also be critical as that should allow us to distinguish between the two scenarios.
@arambaut just pointed out to me that the case is likely a female student (BBC got it wrong):
This changes the balance towards sexual transmission similar to what has been observed previously in Liberia. Sequencing should give a definitive answer.