Hanoi, Aug. 11 -- The Ministry of Health has warned of a heightened risk of the mosquito-borne Chikungunya virus entering Vietnam, as outbreaks spread in several countries and territories in the region. Chikungunya causes fever and severe joint pain, and is spread mainly by Aedes aegypti and Aedes albopictus mosquitoes, also vectors for dengue fever and Zika virus. Most cases are mild and fatalities are rare, adults and newborns face a higher risk of severe illness. On July 22, the World Health Organisation (WHO) issued an alert about the rapid spread of Chikungunya, citing major outbreaks on Indian Ocean islands such as La Reunion and Mayotte, now extending to parts of Africa, South Asia, and Europe. In China's Guangdong province, health...