Authorities, residents should take measures to prevent a dengue wave post-Eid

The situation has further deteriorated in June with the onset of monsoon, which is the breeding season for Aedes mosquitoes.

Global health officials are racing to better understand the Zika virus behind a major outbreak that began in Brazil last year and has since spread to many countries in the Americas.

Brazilian President Dilma Rousseff vows to "win the war" against the Zika virus, but some experts criticized her government's response and warned the Olympics could fuel the disease's spread.