ALT Cover of The Lancet's Special issue on Neurology. Image: Axial brain slices of tau PET parametric images using [18F]MK-6240, overlaid on a grayscale template MRI, from amyloid-\u03B2 positive HEAD study participants with mild cognitive impairment. Warmer colours indicate higher tracer uptake. Copyright: \u00A9 Pascoal Lab, University of Pittsburgh . Quote on cover reads: \"Neurology is entering a biologically informed era with unprecedented potential to prevent or delay disease onset and reduce disability.\"