| Date | Event | Description |
|---|---|---|
| 4 January 2013 | New search has been performed | The search for eligible studies was updated to August 2012. |
| 4 January 2013 | New citation required but conclusions have not changed | The search for eligible studies was updated to August 2012. One CCT added to the update looked at responses of children with ALL receiving maintenance therapy of influenza vaccine compared with responses of healthy siblings. Conclusions of this updated review have not changed. |
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