Definitions for "Followup"
an article posted to a newsgroup in response to an earlier posting
A response to a question posted in a USENET or listserv group.
a piece of work that exploits or builds on earlier work; "his new software is a follow-up to the programs they started with"
an activity that continues something that has already begun or that repeats something that has already been done
Keeping track of the health of people who participate in a clinical study for a period of time during the study and after the study ends.