75% Chance Ebola Might Hit Britain Or France In October
Using Ebola disease spread patterns and airline traffic data, scientists on Sunday predicated a 75 percent chance that the virus could be imported to France by October 24, and a 50 percent chance it could hit Britain by that date.
Those numbers are based on air traffic remaining at full capacity. Assuming an 80 percent reduction in travel to reflect that many airlines are halting flights to affected regions, France's risk is still 25 percent, and Britain's is 15 percent.
Ebola has so far killed more than 3 400 people since it began in West Africa in March and has now started to spread faster, infecting almost 7 200 people so far. Nigeria, Senegal and now the United States - where the first case was diagnosed on Tuesday in a man who flew in from Liberia - have all seen people carrying the Ebola haemorrhagic fever virus, apparently unwittingly, arrive on their shores.
France is among countries most likely to be hit next because the worst affected countries - Guinea, Sierra Leone and Liberia - are French-speaking and have busy travel routes back, while Britain's Heathrow is one of the world's biggest travel hubs.
France and Britain have each treated one national who was brought home with the disease and then cured. The scientists' study suggests that more may bring it to Europe not knowing they are infected.
Belgium has a 40 percent chance of seeing the disease arrive on its territory, while Spain and Switzerland have lower risks of 14 percent each, according to the study first published in the journal PLoS Current Outbreaks and now being regularly updated at www.mobs-lab.org/ebola.html.
The World Health Organisation (WHO) has not placed any restrictions on travel and has encouraged airlines to keep flying to the worst-hit countries. British Airways and Emirates airlines have suspended some flights
But the risks change every day the epidemic continues, said Alex Vespignani, a professor at the Laboratory for the Modeling of Biological and Socio-Technical Systems at Northeastern University in Boston who led the research.
The latest calculations used data from October 1.
Unwitting patients spreading disease
Patients are at their most contagious when Ebola is in its terminal stages, inducing both internal and external bleeding, and profuse vomiting and diarrhoea - all of which contain high concentrations of infectious virus.
But the disease can also have a long incubation period of up to 21 days, meaning that people can be unaware for weeks that they are infected, and not feel or display any symptoms.
This, it seems, is what allowed the Liberian visitor Thomas Eric Duncanto to fly to the United States and spend several days there unaware that he was carrying the deadly virus, before being diagnosed and isolated.
In the European Union, free movement of people means someone unknowingly infected with Ebola could easily drive through several neighbouring countries before feeling ill and seeking help, and spend weeks in contact with friends or strangers before becoming sick enough to show up on airport scanners.
However, the chance of the disease spreading widely or developing into an epidemic in a wealthy, developed country is extremely low, healthcare specialists say.
According to the latest Ebola risk assessment from the European Centres of Disease Prevention and Control, which monitors health and disease in the region, "the capacity to detect and confirm cases...is considered to be sufficient to interrupt any possible local transmission of the disease early."
Nigeria was cited in the research as an example of how Ebola can be halted with swift and detailed action.
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