In Rio, rife with dengue, bacteria-infected mosquitoes are making a difference

Since Rio de Janeiro declared a public health emergency after an outbreak of dengue fever last month, the city has ramped up testing capacities, opened up a dozen dengue health centers and trained medical staff to attend to the ever-growing needs of its population. Home to about half a million people, Niteroi has had just 403 suspected cases of dengue so far this year, and its incidence rate per capita is one of the lowest in the state, with 69 confirmed cases per 100,000 people.