The reported death toll gives the Middle East-based disease a case fatality rate of about 60%, similar to that of the feared H5N1 avian flu.

WSJ: Virus's Toll in Saudi Arabia Raises Fears of Faster Spread

The authors also found that case-fatality from major extracranial bleeds was also two thirds lower on aspirin than on control.

FORBES: Meta-Analysis Adds New Evidence For Cancer Benefits Of Daily Aspirin

The CAA stress the incident is the first case of a helicopter fatality in London since it started keeping records in 1976.

BBC: London helicopter crash: What are the rules for pilots?