Before revision:  In addition, sequential infection data enables recovery of the timing and role of each immune component in controlling a primary infection . A major limitation of previous studies using single infection data is that they have produced discrepant estimates of these quantities.
After revision:  In addition, sequential infection data enables recovery of the timing and role of each immune component in controlling a primary infection , even in the absence of serological data. By contrast, single infection data is that they have produced discrepant estimates of these quantities.