4 July 2014
The outbreak of Ebola virus disease (EVD) in West Africa was first reported in March 2014 in Guinea and since late May has involved three countries: Guinea, Liberia and Sierra Leone . This is the first documented EVD outbreak in these countries, and is already the largest known outbreak of this disease.There had been earlier expectations that the outbreak would be brought under control. However, at the end of May 2014, there was an unexpected large increase in the number of new cases, and the outbreak spread to previously unaffected areas in Guinea and Sierra Leone as well as showing a resurgence in other areas . WHO has credited three factors as being responsible for the continuous propagation of the outbreak:
As of 2 July 2014, the cumulative number of cases (confirmed, probable and suspected) attributed to EVD in the three countries stands at 779, including 481 deaths . The increase in confirmed cases and expansion into new areas are cause for concern as this indicates that the outbreak is not yet under control. The latest WHO risk assessment (24 June 2014) states that the capital cities of all three countries have been affected: Conakry (Guinea), Monrovia (Liberia) and Freetown (Sierra Leone) . However, WHO still does not recommend any travel or trade restrictions be applied to Guinea, Liberia, or Sierra Leone based on currently available information . No other country has yet to report confirmed cases.
Increasing case numbers and extended geographical spread may increase the risk for UK citizens engaged in humanitarian aid and healthcare delivery. This is because most human infections result from direct contact with the bodily fluids or secretions of infected patients, particularly in hospitals (nosocomial transmission) and as a result of unsafe procedures, use of contaminated medical devices (including needles and syringes) and unprotected exposure to contaminated bodily fluids. Interim guidance for humanitarian aid workers in affected countries outlining recommended precautions and advice on what to do if infection is suspected has been produced .
The risk for tourists, visitors or expatriate residents in affected areas, is still considered very low if elementary precautions are followed .
It remains unlikely, but not impossible, that travellers infected in Guinea or Liberia could arrive in the UK while incubating the disease and develop symptoms after their return. Anyone returning from affected areas who has a sudden onset of symptoms such as fever, headache, sore throat and general malaise within three weeks of their return should seek rapid medical attention and mention their recent travel. Clinicians and other medical staff have been alerted via the Central Alerting System about the ongoing situation in West Africa and informed of the available guidance and assistance for diagnosing and managing cases .
In the event of a symptomatic person with a relevant travel history presenting to health care, the PHE Imported Fever Service (0844 7788990) should be contacted by infectious disease clinicians or microbiologists in order to discuss testing.
Further information regarding EVD and this particular outbreak is available on the Ebola pages of the HPA legacy website .