Even though half a million Australians live with dementia, much remains unknown about the disease.
Recently, one global pharmaceutical company, Biogen, has been promoting a drug to combat its most common form, Alzheimer's, after it was approved for use.
Today, the host of the ABC's Health Report, Dr Norman Swan, on whether the drug really does what the company claims.  
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Dr Norman Swan, host, ABC RN The Health Report and co-host, ABC Coronacast