Comparison of influenza virus replication in the lower respiratory tract after the first and second A/Memphis/7/01 inoculations. D. CarrollTimothy R. MatzingerShannon FrittsLinda B. McChesneyMichael MillerChristopher J. 2013 <p>(A) Mean peak infectious virus titer in tracheal secretions (TCID<sub>50</sub>/ml). (B) Mean AUC of the infectious virus titer in tracheal secretions from day 0 to day 7 after re-challenge.</p>