Up to 45 percent of dementia risk could be prevented or delayed, the World Health Organization said Wednesday, citing modifiable risk factors such as tobacco and air pollution.

Up to 45 percent of dementia risk could be prevented or delayed, the World Health Organization said Wednesday, citing modifiable risk factors such as tobacco and air pollution.

The World Health Organization (WHO) has issued updated global guidelines aimed at reducing the risk of cognitive decline and dementia, saying that up to 45 per cent of cases may…