Human beings have their own world which is completely different from the wold of Jinns. Man can not influence Jinns as Jinns can not influence human beings.
Human beings are protected from the evil of Jinns. In few cases, some persons do wrong acts which make them very weak and can be influenced by Jinns, but it they can recover by remembering Allah (SWT) and seeking His help.
Reciting Sura Falaq and Sura Naas is very useful in protection from every evil.