•http://www.moh.gov.sg
•http://www.who.int/csr/don/2009_06_26/en/index.html
•http://www.moh.gov.sg/mohcorp/h1n1.aspx?cid=22146
•http://www.moe.gov.sg/schools/influenza-a-h1n1/media-statements-precautionary-measures/