11.   The disease can only be confirmed by a brain biopsy, usually after death, but studies have shown the illness can be detected in tonsil samples.

v. + illness >>共 223
cause 14.10%
treat 5.22%
report 5.06%
have 4.56%
contract 3.48%
prevent 3.32%
diagnose 3.15%
suffer 2.74%
cure 2.40%
fight 2.24%
detect 0.91%
detect + n. >>共 983
cancer 3.31%
sign 2.66%
problem 2.66%
presence 2.46%
shower 2.41%
change 1.64%
explosive 1.56%
fraud 1.40%
movement 1.40%
disease 1.40%
illness 0.30%
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