Most patients with primary coccidioidomycosis are asymptomatic, but nonspecific respiratory symptoms resembling those of influenza, acute bronchitis, or, less often, acute pneumonia or pleural effusion sometimes occur.
By using retainers to hold the teeth in their new position for a length of time, the surrounding periodontal fibres are allowed to adapt to changes in the bone which can help minimize any changes to the final tooth position after the completion of orthodontic treatment.
The upper part of the lower dash may fight you a bit  not to worry, its stapled to the hard plastic bottom part, though not tightly. I found the best thing is simply to remove the staples (example in Figure 2 C) for good  the grey plastic retainers hold both the upper and the lower portion in place.