Yes, we know antibodies wane quickly but T cell immunity is more difficult to test for
If you have T cell immunity then you might get symptoms until those T cells make new antibodies. But the symptoms will be mild. (Unless dengue fever)
We seem to be so obsessed about waiting antibodies that we are ignoring the second line defense which all science is saying is long lasting..
We don’t need repeated boosters if we have T cell immunity.
My theory is that antibodies are easy to explain and the general public is too thick to understand T cell