In July 2009, the Center for Disease Control and Prevention (the CDC) ceased tracking individual cases of H1N1 Swine flu, CBS News has reported. The CDC advised states to stop testing for the virus in the middle of an international pandemic. Their reasoning was that there was no need for confirmation of actual cases, since the epidemic was obviously underway. When CBS News investigated the data from that time period, they found that most of the reported cases were not H1N1 flu as suspected. In fact, over 80% of the tested cases that presented with upper respiratory infections were not any type of flu at all.