How do I eliminate the negative influences of goetic demons that are causing illness?

-Wash hands frequently (before eating, after using the bathroom, etc)

-Cover your sneeze

-Get vaccinations

-Keep your surroundings clean

-Avoid going to near to sick people, vice versa, avoid being too near to others when sick.

-Used alcohol based hand-sanitizer.

-Keep a healthy lifestyle

Simple.

Stop believing in them.

Scientific research has proven spells, curses, prayers, blessings, etc ... All are ineffective against people who don't believe in them.

And then ... go to a medical doctor.

Drink alcohol til you pass out.

Even demons don't like a hangover. They will quickly vacate.

Just kidding. I have no clue nor do I believe in such powers.