If you’re concerned about factors associated with mental illness, you don’t need to worry about? Hereditary. Virus infections. Physical factors. Early experiences.

You don't need to worry about hereditary factors, as they are often out of one's control and do not necessarily determine whether or not someone will develop a mental illness. Virus infections, physical factors, and early experiences can all play a role in the development of mental illness and may be areas to be concerned about.