'unfairly affect' is correct and can be used in written English.
For example, "The new tax law will unfairly affect low-income earners."
Improper academic procedures that unfairly affect a student's grade.
Do they unfairly affect one particular part of the population?
Even when the commodity price does reflect what's happening on the ground, it can unfairly affect some more than others.
Advocacy groups have squeezed Mr. Bloomberg even more, arguing that cutting the voucher program would unfairly affect Orthodox Jews.
Esguerra says an "always-on" DRM scheme can unfairly affect those who live in rural areas and lack consistent connectivity.
This meant that only recent "shocks" affecting a student's testing capability — like a newly-developed cognitive impairment — could unfairly affect a teacher's IMPACT score.
Among those said to be unfairly affected were disabled people and foster carers.
The company subsequently sued the RSPO last month, claiming it had been "unfairly affected" by the decision.
In addition to seeking damages for Mr. Blair, who is black, it challenges the New York City Police Department's stop-and-frisk policy as aggressive policing that unfairly affects minorities.
In addition, they feel announcement of the contraction plan unfairly affected players who made decisions about their future plans before the announcement.
Although retailers and milk processors blame the falling price of milk on global markets, dairy farmers say they are being unfairly affected.
