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On 26 June, the Nigeria Centre for Disease Control (NCDC) issued a Lassa fever update
for the year until 25 June 2017. Since the beginning of 2017, there were 301 suspected Lassa fever cases in 22 States across Nigeria. There were 65 laboratory confirmed cases and 49 deaths. For the same period in 2016 there were 717 suspected cases, 71 laboratory confirmed cases and 87 deaths from 27 States reported.
The NCDC is continuing to coordinate the response and carry out investigations and active case finding.
Lassa fever is a low risk for most travellers unless living in poor sanitary conditions with overcrowding in rural areas where the host is usually found. Lassa fever is a zoonotic viral disease transmitted via the excreta of an infected Mastomys rat. Healthcare workers are at risk if good infection control and barrier nursing methods are not maintained.
Travellers returning from affected areas who develop symptoms of fever, malaise, headache, sore throat, muscle pain, chest pain, nausea, vomiting, diarrhoea, and abdominal pain should seek medical advice.
