12/3/2023 0 Comments Top trending news in ghana![]() Increasing population immunity through past and ongoing Preventive Mass Vaccination Campaigns (PMVC) supported through the EYE Strategy, and Reactive Vaccination Campaigns (RVC) have increased population immunity rapidly in implementing countries which has contributed to reducing the risk of spread of yellow fever in targeted countries. Uganda has recently rolled-out yellow fever into the Routine Immunization programme. Country-specific estimates of vaccination coverage for 2021 are 54% in Cameroon, 41% in the Central African Republic, 45% in Chad, 67% in the Republic of the Congo, 65% in Côte d’Ivoire, 56% in the Democratic Republic of the Congo, 64% in Gabon, 94% in Ghana, 7% in Kenya, 80% in Niger (subnational introduction limited to four counties in 2021), 63% in Nigeria and 85% in Sierra Leone. Overall, about 71% of confirmed cases are aged 30 years and below, and children aged 10 years and below are disproportionately affected.Īccording to the WHO/UNICEF Estimates of National Immunization Coverage (WUENIC), in 2021 routine immunization coverage against yellow fever in the African Region for childhood vaccinations was 48%, much lower than the 80% threshold required to confer population immunity against yellow fever, indicating the presence of an underlying susceptible population at risk of yellow fever and the risk of continued transmission. The most affected age group amongst confirmed cases in 2021 was 10 years and below meanwhile, the most affected group in 2022 is 20 to 30 years old. The male-to-female ratio among confirmed cases is not significantly different in 20 (1.3 and 1.6 respectively). The high overall CFR among confirmed cases in 2021 (17 deaths, 11%) continued in 2022 (six deaths, 12%). ![]() Of these, 23 deaths have been reported among confirmed cases (CFR among confirmed cases 11%) (Table 1). Since 2021, a total of 203 confirmed and 252 probable cases with 40 deaths and a CFR of 9% have been reported. One country, Gabon, reported an isolated confirmed case in 2021, but no further cases were registered in 2022. Eight of these countries are experiencing a continuation of transmission from 2021 (Cameroon, the Central African Republic, Chad, Côte d'Ivoire, the Democratic Republic of the Congo, Ghana, Nigeria, and the Republic of the Congo) and four countries are newly reporting confirmed cases (Kenya, Niger, Sierra Leone and Uganda). In 2022, 12 countries in the WHO African Region have reported confirmed cases of yellow fever (Cameroon, the Central African Republic, Chad, Côte d'Ivoire, the Democratic Republic of the Congo, Ghana, Kenya, Niger, Nigeria, the Republic of the Congo, Sierra Leone and Uganda). However, the countries remain at high risk. Recent Reactive Vaccination Campaigns increase population immunity and may have contributed to reducing the risk of yellow fever spread in targeted countries, resulting in a gradual downward trend in reported confirmed cases in 2022. Risk factors for further yellow fever spread and amplification include low population immunity, population movements, viral transmission dynamics, and climate and environmental factors that have contributed to the spread of Aedes mosquitoes. ![]() This is an update on the yellow fever situation in the WHO African Region since the last disease outbreak news was published on 2 September 2022.įrom 1 January 2021 to 7 December 2022, a total of 203 confirmed and 252 probable cases with 40 deaths (Case Fatality Ratio 9%) were reported to WHO from 13 countries in the WHO African Region.
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