Table 1.

Vaccine groups^a

Group no.	Vaccine
1	Chitosan-pcDNA3.1 (mock)
2	Chitosan-pVP1
3	Chitosan-pHMGB1
4	Chitosan-pVP1 plus chitosan-pHMGB1

^aThe mice in each group were immunized 4 times biweekly at a dose of 50 μg of each plasmid. The mice that received pVP1 alone, pHMGB1, or empty plasmid also received an additional 50 μg pcDNA3.1 so that the total DNA amount was 100 μg.