VfR is a German-language acronym that may appear in various contexts:

VFR tourism: is it underestimated?
Understanding VFR tourism behaviour: the first five years of the United Kingdom tourism survey
Comparison of Expert and Novice Scan Behaviors During VFR Flight
Health Education Regarding Tuberculosis and VFR-Travel for International Students in Victoria
The vfr gene product, required for Pseudomonas aeruginosa exotoxin A and protease production, belongs to the cyclic AMP receptor pro...
Role of GacA, LasI, RhlI, Ppk, PsrA, Vfr and ClpXP in the regulation of the stationary-phase sigma factor rpoS/RpoS in Pseudomonas
Differential Regulation of Twitching Motility and Elastase Production by Vfr in Pseudomonas aeruginosa
Does the visiting friends and relatives' typology make a difference? A study of the international VFR market to the United States.
Characterization of DNA-binding specificity and analysis of binding sites of the Pseudomonas aeruginosa global regulator, Vfr, a hom...
fleQ, the Gene Encoding the Major Flagellar Regulator of Pseudomonas aeruginosa, Is σ70 Dependent and Is Downregulated by Vfr, a Ho...