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(added on 2016/02/04)

Emergence of mosquito-borne infections 突如其來的新蚊患

Data source: Centers for Disease Control and Prevention, USA
Map created by CUHK SpatioEpi Group

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On 1st February 2016 World Health Organization (WHO) declared “Public Health Emergency of International Concern” in response to the recent emergence of neurological disorders and neonatal malformations in South America, for which a causal linkage between the mosquito-borne Zika virus disease and the cases is highly suspected. Zika virus is transmitted through the bites of Aedes mosquitoes, which have been known to cause other infections. The map shows the geographical distributions of actively transmitting Zika virus and 4 other Aedes-transmitted diseases, namely Dengue fever, Yellow fever, Chikungunya fever and West Nile virus infections. These diseases are mostly found in tropical and subtropical region, where sufficient temperature and moisture favour the breeding of Aedes mosquitoes. Of these, dengue is currently most widely spread around the world. Yellow Fever is concentrated in countries in Africa and South America, while Chikugunya prevails in South East Asia, Africa and South America. West Nile virus infection is most commonly reported in USA. Currently most of Zika virus infections came from South America, and the number of countries reporting new cases has continued to rise.

Other than designing vaccines against Zika virus, scientists are studying the deployment of genetically-modified mosquitoes to restrict the growth of risky mosquitoes. Nevertheless, preventive measures at personal level are the most effective way to prevent these mosquito-borne diseases.

Data for this map were derived from statistics from Centers for Disease Control and Prevention, USA