A number of natural and synthctrc sugar analogues have been tested for then antrvlral acttvtty, usmg an mfluenza vuus stram as a model Hemagglutmatmg tttres (HA) and cytopathtc effect (CPE) were surveyed to esttmate the vuus productton It was found that mtroductton of the bcnzyl group mto these sugars generally causes them to become antlvtrduy active Substttutron wtth metnJ, acetyl, undyl and thtocyanyl groups or dertvatlzatton wtth azrdo. tsopropyhdene and bcnzyhdene groups were wrthout effect All sugars contauung the 2-deoxy-2-acetamtdo group were Inactive S-roar analogue, Synthettc sugar, Anttvrral actlvny, Hemagglutmatmg trtre, Influenza vrrus