Will Falconer, DVM Moderator
Hi Lydia,
I recently taught an entire online course re: titers (and nosodes and tautodes). It'll come out again some months from now.
A key understanding that's important to glean, and that I emphasized in the course, is that there's no logical need to repeat titers throughout life. A drop in titer ≠ a drop in immunity. You can learn more about that on this page and others on my site, if you use the search box and "titers."
I hope you haven't already gotten another MMR before this reaches you.
Thanks for stopping by.