Spread of infection

It is unlikely that very serious health conditions will arise in Sweden as a result of climate change. Nevertheless, there is a risk that disease spread by insects, ticks and rodents will become established. The climate also has an impact on  the survival and spread of disease organisms.

Climate change globally has a major impact on the earth's ecosystems. Animal and plant species geographical distribution and living conditions are being altered. 

According to climate scenarios, the average temperature in Sweden will continue to rise. We can expect an increased and more irregular precipitation, as well as a greater number of extreme weather events. This increases the risk of outbreaks of infectious diseases.

One of the conclusions of the Swedish Commission on Climate and Vulnerability was that there is not a high risk of very serious health conditions arising in Sweden as a result of climate change. However, serious situations may arise if central authorities' or the mass media's handling of an outbreak of disease is not considered carefully. 

Serious situations can also arise if Sweden receives an increased number of imported cases of infectious diseases as a result of increased global infection rate. 

Diseases that are spread by insects, ticks and rodents, known as vector-borne diseases, are judges to have a risk of becoming established or being spread in the event of climate change as the climate has a direct impact on these vector animals. 

The climate also has an impact on the survival of disease organisms and their spread in soil and water. Consequently, some food-, feed- and water-borne infectious diseases show an increased risk of spreading in the event of a changed climate.