Avian influenza. Avian influenza, or “bird flu,” refers to influenza A viruses passed from birds to humans. The majority of cases have resulted from contact with infected poultry, such as domestic chickens, ducks, and turkeys [24, 25]. Human-to-human transmission has been reported but is very rare. The symptoms of avian influenza depend on which virus caused the infection. Symptoms depend on the infecting virus strain and range from typical influenza-like symptoms (eg, fever, headache, cough, sore throat, and myalgias) to eye infections, pneumonia, acute respiratory distress, and other severe and life-threatening complications [24]. Search volume index graphs for the term “(bird flu)” worldwide and in the United States are shown in Figures 8and 9, respectively. The worldwide search volume index graph indicates an outbreak of avian influenza between 2005 and 2006, which spread from China to Turkey. The US search volume index graph shows a similar spike; however, there were no reported outbreaks of avian influenza in the United States in 2005 and 2006 [26]. The US spike is probably a reaction to media reports of an outbreak in Asia.