Facebook nixes billions of fake accounts

Facebook on Wednesday said it has taken down some 5.4 billion fake accounts this year in a sign of the persistent battle on social media against manipulation and misinformation.

Europe gives go ahead to market Ebola vaccine

The European Union authorised the marketing of a vaccine against Ebola on Monday, permitting the first wider commercial use of a protection that has helped stem an outbreak in DR Congo.

Greater Sydney faces 'catastrophic' bushfire threat

A state of emergency was declared on Monday and residents in the Sydney area were warned of "catastrophic" fire danger as Australia girded for a fresh wave of deadly bushfires that have ravaged the east of the country.

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