Sources

http://www.webmd.com/hiv-aids/tc/human-immunodeficiency-virus-hiv-infection-topic-overview

http://eol.org/info/458

https://msu.edu/course/mmg/569/Virus%20Structure.htm

http://www.thebody.com/content/art12264.html

https://www.aids.gov/hiv-aids-basics/hiv-aids-101/how-you-get-hiv-aids/

http://www.healthline.com/health/hiv-aids/symptoms-men

http://www.niaid.nih.gov/topics/HIVAIDS/Understanding/Treatment/pages/arvdrugclasses.aspx

http://www.ucsfhealth.org/conditions/aids/treatment.html

http://www.unaids.org/en/regionscountries/countries/mexico