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Search: authors:"Sergio Yactayo"

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Epidemiology of Chikungunya in the Americas

Chikungunya virus (CHIKV) emerged in the Americas in late 2013 to cause substantial acute and chronic morbidity. About 1.1 million cases of chikungunya were reported within a year, including severe cases and deaths. The burden of chikungunya is unclear owing to inadequate disease surveillance and underdiagnosis. Virus evolution, globalization, and climate change may further CHIKV ...

Efficacy and Duration of Immunity after Yellow Fever Vaccination: Systematic Review on the Need for a Booster Every 10 Years

, Peru, E-mails: and . Sergio Yactayo, Control of Epidemic Diseases, and Pandemic and Epidemic Diseases, World Health Organization, Geneva, Switzerland, E-mail: yactayos@ who.int. REFERENCES

Yellow Fever in Africa: Estimating the Burden of Disease and Impact of Mass Vaccination from Outbreak and Serological Data

Neil Ferguson and colleagues estimate the disease burden of yellow fever in Africa, as well as the impact of mass vaccination campaigns. Please see later in the article for the Editors' Summary