[naasking]

Stress responses and hysteria can also cause numerous health problems (see wind turbine syndrome, EMF sensitivity, etc.). People misattribute cause and effect all the time, and they notice sicknesses they would normally dismiss if there were no obvious cause that understandably heightens their paranoia.

Which isn't to say nothing is going on either, this was a colossal regulatory failure letting these companies overwork train operators and not forcing rail operators to upgrade the braking systems. But let's also not jump to conclusions.