[Faraday]

But researchers at the University of Liverpool in England said computer modeling, based on the changing demographics of Europe from 1000 to 1800 AD, showed how hemorrhagic fever forced up the frequency of this mutation from 1 in 20,000 at the time of the Black Death to values today of 1 in 10.

Another example of scientific ignorance from Reuters. Shocking, but consonant with their political ignorance.

[Strategerist]

It could have been worded better. The frequency of the mutation rose because people without it died.

[GGpaX4DumpedTea]

"...example of scientific ignorance from Reuters..."

What is the obvious example of scientific ignorance from Reuters in this?