If I replicate a campaign, will the filters give me the same list of recipients?

When you replicate a campaign, the filters stay the same, but your recipients list will always reflect current conditions.

For example, let's say you previously sent a custom recall campaign using the filter "unscheduled patients who are past due for a recall by 0 to 3 months." When you replicate the campaign, the list of recipients will reflect whoever currently (as of the date you are working on the campaign) matches that filter.

This also means that if you start working on a campaign today, then save it in drafts and return to it a week from now, you may have a slightly different list of recipients.