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Comparison of the effects of i.m. and i.g. administrations of A/Johannesburg/97 HA on serum HI titers. The data shown are for pooled sera from groups of mice immunized i.m. with 1 μg of A/Johannesburg/97 HA unadjuvanted (IM), or immunized i.g. with 20-μg doses of A/Johannesburg/97 HA alone (HA Only), and in combination with either 1 or 10 μg of wtLT, 10 or 100 μg of LT-K63, or 10 or 100 μg of LT-R72 as indicated.
