Frequency of influenza H3N2 intra-subtype reassortment: attributes and implications of reassortant spread

Table 3 Frequency of reassortment

Dataset	Total genomes (N)^a	Reassortant genomes (N)	Fraction of reassortants	Reassortment events (N)	Event frequency
a) Frequency calculated on the 20 MrBayes + GiRaF subsets and the full dataset
Subset 1	257	61	0.237	9	0.035
Subset 2	254	83	0.327	9	0.035
Subset 3	259	64	0.247	12	0.046
Subset 4	261	159	0.609	9	0.034
Subset 5	257	174	0.677	10	0.039
Subset 6	256	143	0.559	10	0.039
Subset 7	259	165	0.637	6	0.023
Subset 8	252	72	0.286	8	0.032
Subset 9	261	84	0.322	14	0.054
Subset 10	258	75	0.291	9	0.035
Subset 11	257	175	0.681	9	0.035
Subset 12	259	163	0.629	8	0.031
Subset 13	258	83	0.322	7	0.027
Subset 14	255	61	0.239	10	0.039
Subset 15	256	68	0.266	11	0.043
Subset 16	251	80	0.319	7	0.028
Subset 17	256	79	0.309	9	0.035
Subset 18	251	35	0.139	7	0.028
Subset 19	254	153	0.602	8	0.031
Subset 20	258	143	0.554	5	0.019
Average	256.45	106	0.4126	8.85	0.0345
SD			0.1752		0.0077
Full set	2057	805	0.3913	69	0.0335
b) Frequency calculated on the 10 data subsets adjusted for unequal sampling
Subset 1	1188	619	0.521	36	0.030
Subset 2	1188	626	0.527	37	0.031
Subset 3	1188	629	0.529	38	0.032
Subset 4	1188	632	0.532	39	0.033
Subset 5	1188	631	0.531	41	0.035
Subset 6	1188	639	0.538	42	0.035
Subset 7	1188	632	0.532	37	0.031
Subset 8	1188	628	0.529	37	0.031
Subset 9	1188	633	0.533	36	0.030
Subset 10	1188	635	0.535	38	0.032
Average	1188	630.4	0.5306	38.1	0.0321

ISSN: 1741-7007