[NY Times] Understand how mosquitoes transmit virus in 5 Simple Steps!

  1. Mosuqito feeds on virus-infected blood
  2. Infected blood travels to the midgut
  3. Virus enters the circulatory system
  4. …and travels to the salivary glands
  5. Mosquito bites again, injecting virus infected saliva into victim before feeding.

source: 
http://www.nytimes.com/interactive/2016/health/what-is-zika-virus.html?_r=0