The deadly disease has gripped UK airwaves but is unlikely to reach its airwaysby Philip Hunter / July 31, 2014 / Leave a comment
The Ebola outbreak in West Africa is a major threat to many other sub Saharan countries but only a small one for the developed world, including the UK. The virus does not transmit that easily and relies on poverty and poor hygiene to infect large numbers of people.
The reason the current Ebola outbreak has evoked such fear around the world is because the disease is exceptionally severe, with a fatality rate between 50 per cent and 90 per cent, varying according to the specific strain of virus as well as age and vulnerability of the people infected. The mortality rate for the current Ebola outbreak has been running at about 60 per cent, which is close to average for the disease. By contrast the famous Spanish flu pandemic just after the First World War killed 2.5 per cent of infected people. The deadliness of Ebola has prompted a rehearsal of measures to restrict its spread if it does arrive in the UK, such as immediate quarantining of anyone even showing signs of fever, and subsequent confirmation of infection via a blood test looking for the presence of the virus’s DNA.
But despite this the current Ebola outbreak has provoked only mild alarm among relevant UK agencies such as Public Health England. This is because it lacks one key property of a truly global pandemic. Apart from virulence—a virus’s fatality rate and ability to invade the host’s tissues—the other principle difference between disease causing viruses is their transmissibility—the ease with which they spread between humans. The pandemic risk of a virus, or any pathogenic organism, is a product of the severity of infection and the rate of transmission. The transmission of Ebola is virtually eliminated by good hygiene practice, such as regular hand washing at appropriate places and times.
The Spanish flu ended up killing 50 million people because it rampaged around the world, with over 1 billion people being infected. It is inconceivable that the current Ebola outbreak, even…