In Sindh province, Pakistan, 250 dengue fever cases have been reported since the beginning of the year. 235 of the cases, including one death has been reported in the provincial capital of Karachi.
In just the past week, 21 cases were reported from Sindh, including 19 from Karachi.
Dengue is a mosquito-borne viral infection that causes a severe flu-like illness, and sometimes causes a potentially lethal complication called severe dengue. The viruses are passed on to humans through the bites of an infective female Aedes mosquito, which acquires the virus while feeding on the blood of an infected person. Dengue is one of the fastest spreading viral infections in the world, and is endemic to Pakistan.