The differences between a virus and fungi are:-
#"Fungi":#
#=># Single-celled or forms of threads like structure
#=># They are living and either do aerobic or anaerobic respiration.
#=># They are free-living organisms which do not depend upon a host.
#=># They either use saprophytic or parasitic nutrition.
#=># Some examples are yeast, mushrooms etc.
#"Virus":#
#=># They are unicellular organisms which are on the borderline of living and non-living as they can only survive when inside the host body.
#=># They are mostly categorized as "NoN" living
#=># They depend upon the host for their survival
#=># They use parasitic mode of nutrition harming the host
#=># Some examples are SV40, AIDS virus (HIV), Adenovirus etc.