Dengue fever is currently spreading at an unusually high rate in Brazil. In the first two months of the year, 1,017,278 confirmed or probable infections were counted in the South American country, the Ministry of Health announced on Thursday. That is almost five times as many cases as in the same period last year’s 207,475. The health authorities also counted 214 confirmed deaths and 687 more are still being investigated for a link to the dengue virus. Six states and the capital district have declared a health emergency. The heavy rainfall and high temperatures in recent months are likely to h…