Figure 2From: Deletions of neuraminidase and resistance to oseltamivir may be a consequence of restricted receptor specificity in recent H3N2 influenza virusesNA activity of A/OK/323/03 was reduced during passage at moi 0.01 but not at limiting dilution. The virus yield at each passage (TCIU) is compared to NA activity expressed as NA/HA ratio during limiting dilution passages (left) or moi 0.01 passages (right). Measurements were made on the first well for 0.01 moi passages and on the last well that showed infection for the limiting dilution passages. For comparison at the same scale, we plotted the ratio NA/(log2HA) and log(TCIU).Back to article page