Both incidents were terrifying but really hard to pin down a trigger to.
BBC: Children with allergies 'being let down': Your comments
2.
The system had the potential to include real-time risk analysis that could trigger the request of a PIN for a transaction that falls outside of normal parameters.
FORBES: Mobile payment is finally here (maybe)
3.
Studies on people have left more questions than answers, and laboratory experiments have failed to pin down a plausible mechanism whereby weak magnetic fields could trigger the disease.