Mosquito spit can increase dengue severity
Blood vessels weakened by saliva may accelerate spread of virus
![mouse ears](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/06/061616_ap_mosquito-saliva_free.jpg?fit=860%2C460&ssl=1)
RED SPREAD A red marker molecule, about the size of the dengue virus, spread farther through a mouse ear when treated with an extract of mosquito saliva (left) than when not treated with the extract (right).
M.A. Schmid and D.R. Glasner