Dengue is now considered a re-emerging disease. Between 2000 and 2019, the number of cases reported globally increased from 500,000 to 5.2 million.
Brazil's two most populous cities have announced measures to deal with the explosion of dengue cases in the run-up to Carnival. Rio de Janeiro declares a state of health emergency before Carnival, which attracts millions of tourists from around the world. For confidential support call the Samaritans in the UK on 08457 90 90 90, visit a local Samaritans branch or click here for details.