And the winner is...Mali, by a nose

The Mali government has confirmed the first case of Ebola in the country.

It said a two-year-old girl had tested positive for the haemorrhagic virus. She recently returned from the neighbouring Guinea.
Speaking on state television on Thursday, Malian Health Minister Ousmane Kone said the infected girl was being treated in the western town of Kayes.

She was brought to a local hospital on Wednesday and her blood sample was Ebola-positive, Mr Kone said.

The child and those who have come into contact with her have been put in quarantine.
The girl's mother died in Guinea a few weeks ago and the child was then brought by relatives to Mali, Reuters news agency quotes a health ministry official as saying.
Mali is now the sixth West African country to be affected by the latest Ebola outbreak - however Senegal and Nigeria have since been declared virus-free by the WHO.
With porous borders, countries neighbouring Guinea, Sierra Leone and Liberia are on high alert for possible imported cases of the virus, says BBC regional correspondent Anne Soy.

So evidently "borders closed" means "except for two years olds of infected mothers, and their families" in Mali.
Thus not only the girl is infected, but anyone and everyone who went to Guinea, and has been caring for her at home since, has been exposed, including on the 300 mile trip from Guinea to Kayes, which includes right through Mali's capitol city of Bamako.
(UPDATE: That would be 43 people as of Oct. 24.)
Until now, to screw up this hard, we'd usually need to call in the CDC.

Nice going, Mali Customs officers!

Elevator briefing on Mali: Slightly less than twice the size of Texas, 16M+ people, half under the age of 16, 98% Muslim, literacy rate 33%, 1300 doctors for the entire country - 1 per 12,500, one of the worst ratios in the world, an annual income avg. of US$3/day, with 36% making less than US$1.25/day. 7000 soldiers, 5000 police, give or take.Lumber yard, meet white phosphorous grenade.