Governments are no longer able to control the movements of persons, goods, capital, ideas, viruses or anything else across frontiers.
But Uganda, the world capital of viruses, mostly shrugged – after all, malaria-carrying mosquitoes cause the deaths of 100,000 people in the country every year, most of them under five.
Though there have been fewer cases reported in the capital, Freetown, the virus has spread to new areas.
Although roads were unpaved and bumpy, they were passable enough for villagers to ride motorcycles into dense capital cities, carrying the virus on board.
The EU has pledged €500,000 (£415,000) to try and stop the virus reaching the capital.
The prevalence of the virus in the capital Freetown is thought to be one of the reasons why Ebola is spreading so fast in the west.
In July of 2014, I was working as a nurse for a small non-governmental organization in the Sierra Leone capital, Freetown, as the Ebola virus disease (EVD) epidemic grew in the east of the country.
The latest 18 cases occurred across five governorates throughout Yemen, including in two districts in the country's capital Sanaa and suggesting the virus had spread across the country.
Vitral et al. [ 17] has shown declining seroprevalence for hepatitis A virus in Brazilian capitals, probably as the result of improved sanitary conditions and water treatment.
A Liberian diplomat brought the virus to the commercial capital Lagos in July but the outbreak was contained, with only 20 known cases and eight deaths.
