Neurological symptoms and complications of influenza in the elderly.

The most common neurological symptoms of influenza in more than half of the elderly are general weakness and increased fatigue. Myalgias are common, headache less often. Nausea is not uncommon. Of the complications, encephalopathy is the most common. Cases of influenza encephalitis have also been reported. We have not encountered a stroke. Concerning other complications, bacterial pneumonia was the most common.