Read here. The IPCC's climate scientists and green global warming alarmists have long predicted that global warming will cause an increase/spread of malaria to higher latitude regions. As with most catastrophic AGW predictions, the IPCC and alarmists are wrong, again.
In a peer reviewed study, researchers analyzed all pertinent Finnish data from 1750 to 2008, which robustly confirms that malaria's incidence declined in the Nordic region while global temperatures increased. The decline occurred well before advanced malaria eradication techniques were implemented.
"The authors analyzed malaria statistics that were collected in Finland from 1750 to 2008 via correlation analyses between malaria frequency per million people and all variables that have been used in similar studies throughout other parts of Europe," including temperature data, animal husbandry, consolidation of land by redistribution and household size...report that "malaria was a common endemic disease in Finland in the 18th and 19th centuries and prevalent in the whole country," and they say that "mortality during malaria epidemics usually varied between 0.85 and 3%." Thereafter, however, they found that "malaria declined slowly in Finland without any deliberate counter-measures," such that "the last epidemic in Helsinki occurred in 1902" and "during the 1930s malaria was close to extinction."" [Lena Hulden, Larry Hulden 2009: Malaria Journal]