Why Ebola reaching Nigeria’s largest city is a whole new level of scary ".....On Jul. 24, Nigerian authorities confirmed that a Liberian man, Patrick Sawyer, had collapsed in Lagos after flying there from the Liberian capital, Monrovia, and tested positive for Ebola; Sawyer died on the night of July 24-25 This is alarming. So far, Ebola has been confined to Guinea, Sierra Leone, and Liberia—war-torn and largely rural west African countries. But Lagos is different; not only is it Africa’s biggest city, with 21 million people. It’s also one of the world’s most densely populated. And perhaps scariest of all, it’s a center for international travel—meaning that if it’s not contained, the virus could easily go global. Sawyer’s was the first-ever recorded case of Ebola in Nigeria, according to the Nigerian Tribune. ....Sawyer, who worked for the Liberian finance ministry, turned himself in to Nigerian health authorities after he began vomiting and having diarrhea in the middle of the three-hour flight from Monrovia to Lagos. Nigeria’s health minister says authorities are currently trying to track down an unspecified number of the 100 or so other passengers on the flight. This might be tricky. The 35 Nigerian co-passengers took flight once word got out that the health ministry was supposed to have quarantined them, prompting the federal government to launch a manhunt to track them down... Given that deadly efficiency, the fact that at least 35 people who might have been exposed are at large in Lagos—to say nothing of the other passengers arriving from infected areas of West Africa—is disquieting as well. Confined by geography, the built-up areas of metropolitan Lagos now have more than 20,000 people per square kilometer (53,000 per square mile)—about the same urban density as Dhaka or Mumbai. It has among the highest prevalence rates of open defecation of all major African cities, as well as some of Africa’s lousiest healthcare infrastructure....." The virus incubation period from initial infection to onset of symptoms is 2 to 21 days. A lot of eyes are going to be on the largest city in Africa for a while, you can bet.