Table 2.

Summary of evolutionary rates of head antigenic sites and stalk-mAb footprints of sH1N1, pH1N1 and H3N2 based on empirical trees.

Virus	Head Antigenic Sites Evolutionary Rate (a/s/y) (95% BCI*)	Stalk mAb Footprint Evolutionary Rate (a/s/y)	Head Antigenic Sites:Stalk mAb Footprint Rate Ratio
sH1N1	9.90 × 10−3 (9.77 × 10−3–1.00 × 10−2)	9.11 × 10−4 (7.83 × 10−4–1.04 × 10−3)	10.9
pH1N1	9.74 × 10−3 (9.54 × 10−3–9.97 × 10−3)	3.26 × 10−3 (3.02 × 10−3–3.54 × 10−3)	3.0
H3N2	1.29 × 10−2 (1.27 × 10−2–1.30 × 10−2)	2.96 × 10−3 (2.82 × 10−3–3.10 × 10−3)	4.3

^*Bayesian Credible Interval.