Event Updated Country Hazard Disease Event Description IHR Assessment
2018-01-23 Gambia Infectious Rift Valley Fever


On 3 January 2018, the Ministry of Health of Senegal notified WHO of a case of Rift Valley Fever (RVF) in a 52-year-old Korean man, a resident of the Gambia, that was reported from a hospital in Dakar.


Key facts:

–     Rift Valley fever (RVF) is a viral zoonosis that primarily affects animals but can also infect humans.

–     The majority of human infections result from contact with the blood or organs of infected animals.

–     Human infections have also resulted from the bites of infected mosquitoes (most commonly the Aedes and Culex mosquitoes).

–     To date, no human-to-human transmission of RVF virus has been documented.

–     The incubation period (the interval from infection to onset of symptoms) for RVF varies from 2 to 6 days.

–     Outbreaks of RVF in animals can be prevented by a sustained programme of animal vaccination

Public Health Risk (PHR)
2018-01-20 Brazil Infectious Yellow Fever


In recent weeks, the number of confirmed human cases of yellow fever has tripled in Brazil, mainly in the states of São Paulo and Minas Gerais. In effect, between 1 July 2017 and 14 January 2018, 35 confirmed human cases of yellow fever were reported in Brazil, including 20 deaths and 145 suspected cases that are under investigation. Confirmed cases were notified in the states of São Paulo (20 cases, including 11 deaths), Rio de Janeiro (3 cases, including 1 death), and Minas Gerais (11 cases, including 7 deaths), and in the Federal District (1 fatal case). Public Health Risk (PHR)
2018-01-17 South Sudan Infectious Rift Valley Fever


On 28 December 2017, the Eastern Lakes Ministry of Health reported a suspected viral hemorrhagic fever cluster to the National Ministry of Health and WHO. The initial cluster involved three deaths in Thonabutkok village, Yali Payam, Yirol East County with 7 December 2017 as the earliest date of onset. There was no history of close physical contact between the cases. None of the cases received a supervised burial and no samples have been collected.


The initial case was a 30-year-old female Gravida 5 Para 4+0; housewife from Thonabutkok village in Yirol East county. The second case was a 13-year-old female from Thonabutkok.  The third case was a 15-year-old male from Thonabutkok village.  The fourth suspect case, reported on 12 January is an 18-year-old 7-month pregnant female from Thonabutkok village and contact of one of the initial cases, also developed symptoms 9 January 2018. Her symptoms included chills, joint pains, headache, neck pain and two episodes of epistaxis.  Sixty contacts were listed and are being monitored by a surveillance team; to date only one contact has developed symptoms.


On 14 January two blood samples tested at the UVRI were positive for IgG against RVFV, one was IgG and IgM positive from suspected cases in Yirol West, this lead to 3 confirmed RVF cases, however 4 other were negative for both PCR and serology.


Blood samples from 7 animals ( sheep 2, goats 2 and cattle 3) have been collected and sent on 14th January to UVRI, for RVF testing and results are pending.

Public Health Risk (PHR)