Dementia is such "a horrible condition" it has become the disease that most frightens people over the age of 55, the Health Secretary told Good Morning Britain.
Speaking ahead of a conference on dementia, Jeremy Hunt reiterated the Prime Minister's pledge to find a cure for the disease "by 2025" and remained optimistic it could be beaten.
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A suspected drunk driver ploughed into a crowd during Mardi Gras celebrations in the southern US city.
The singer had been tweeting in support of migrants when she was bombarded with abusive messages.
Ministers are reportedly considering plans in a bid to lower inward migration.