Saw this under comments for the booster.
"They definitely are necessary for the immunocompromised. I have a friend who had a kidney transplant two years ago, and even with both doses of the Pfizer vaccine AND both doses of the Moderna vaccine, her antibody count remains dangerously low."
Antibody count is irrelevant. I had Covid in February so my “antibody count” is probably dry low now but it is T and B cell immunity that matters. Active antibodies (fighters on patrol) always fade, but the T and C cell (memory of the previous fought off virus ready for rapid future deployment) are the key to long term protection and are why those who had SARS-Cov-1 are still showing immunity decades later.
Thanks for posting that info.