BREATHE FREELY
BREATHE FREELY
1, 3, 11, 14, 15, 17 http://www.clevelandclinicmeded.com/medicalpubs/diseasemanagement/infectious-disease/upper-respiratory-tract-infection/
2 http://www.cdc.gov/features/rhinoviruses/
4,16 General medical knowledge
5, 7 http://www.emedmd.com/content/respiratory-tract-viruses
6, 12, 13 http://www.nhs.uk/conditions/Respiratory-tract-infection/Pages/Introduction.aspx
8 http://www.who.int/topics/influenza/en/
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