Mosquito
Mosquito-borne diseases are currently most prevalent in East Africa, Latin America,  Southeast Asia, and India; however, emergence of vector-borne diseases in Europe have recently been observed. A weighted risk analysis demonstrated associations to climate for 49% of infectious diseases in Europe including all transmission routes. One statistical model predicts by 2030, the climate of southern Great Britain will be climatically-suitable for malaria transmission "Plasmodium vivax" malaria for 2 months of the year. By 2080 it is predicted that the same will be true for southern Scotland.
Mosquito bite allergy
Individuals with systemic mosquito bite allergies respond to mosquito bites with intense local skin reactions (e.g. blisters, ulcers, necrosis, scarring) and concurrent or subsequent systemic symptoms (high-grade fever and/or malaise; less commonly, muscle cramps, bloody diarrhea, bloody urine, proteinuria, and/or wheezing; or very rarely, symptoms of overt anaphylaxis such as hives, angioedema (i.e. skin swelling in non-mosquito bite areas), shortness of breath, rapid heart rate, and low blood pressure]]. There are very rare reports of death due to anaphylaxis following mosquito bites. Individual with an increased risk of developing severe mosquito bite reactions include those experiencing a particularly large number of mosquito bites, those with no previous exposure to the species of mosquito causing the bites, and those with a not fully developed immune system such as infants and young children. Individuals with certain Epstein-Barr virus-associated lymphoproliferative, non-Epstein-Barr virus malignant lymphoid, or other predisposing disease also have an increased rate of systemic mosquito bite reactions but are considered in a separate category (see below).