You are joking, right?
What's the solution to diseases? Improving peoples' general health and wellbeing, so that their immune systems can handle the disease. The solution is not to eradicate an entire species in the middle of an already distraught global ecological catastrophe.
For every instance of a mosquito causing a malarial infection, there are likely uncountable instances of mosquitoes causing inoculation.
Eliminating them would be devastating to Scandinavia's biodiversity.