Are foxes dangerous span to humans?

Typically, no.  Foxes are not dangerous to humans and do not attack humans.  However, if a fox is captured or handled then the fox may defend itself and this could result in a human being bitten.

There have been occasions where foxes enter homes (for food and/or shelter), if they feel cornered or trapped, they could bite a human in defence – but most often than not, a fox will naturally flee rather than fight.