FIG 4 .

Schematic representation of lineage dynamics for segments HA, M, NA, and NP. Consensus (a) and haplotype (b) frequencies across time points (see Table S4 and Fig. S2 in the supplemental material). M segment symbols: white asterisk, S31N; white cross, V27A. NA segment symbols: black asterisk, E119V; white asterisk, I222V; white caret, del245–248. Gray arrowheads point to the suspected reassortment event. Note that time points 196 and 225 show the data from the primary swabs and not from the culture isolates. Numbers above each panel are days since first sample was collected; numbers to the left of each graph in panel b are percents.