Ethics
The SRI protocol was approved by the University of the Witwatersrand
Human Research Ethics Committee (HREC) and the University of
KwaZulu-Natal Human Biomedical Research Ethics Committee (BREC) protocol
numbers M081042 and BF157/08, respectively. The ILI and control protocol
was approved by BREC protocol number BF080/12. This surveillance was
deemed non-research by the US Centers for Disease Control and Prevention
(non-research determination number: 2012-6197).