Now causing illness is the alternative to radiation torture

Though radiation torture is very effective in destroying the memory and causing great pain, it only has temporary effect for a few months or years

If the victim takes precautions, he or she can recover
In some cases,the victim will also document the torture in great detail
Radiation torture is also resource intensive and security agencies are demanding large bribes

So now causing illness is the preferred option to destroy the health of a person with powerful enemies.