Table 3. Antigenicity-associated sites of H1N1 identified using the support vector regression based on recursive feature elimination.

Order of variable importance	Amino acid position
1	130
2	54	127	193
3	43
4	141
5	190
6	160
7	121	205
8	71
9	273
10	321
11	125
12	96
13	277
14	69
15	187
16	269
17	57