Its important to note that Immunity debt is a concept that anti lockdown activists created in 2020. It was not in medical texts before that point, it never had any science behind it. It was a political term used to end mitigations against Covid not a scientific fact.
There is no rethinking here from serious science (The BMJ is a really bad journal and one of the ones that supported this garbage), the science on infections has been clear for decades, every infection damages us. Covid especially so it damages the immune system directly suppressing CD4 and 8 T cells, B cells and other aspects. Its not a subtle change, in Long Covid research its become increasingly hard to find controls, many people without symptoms show the same blood based markers of immune dysruption and cognitive slowing.
There is no rethinking here from serious science (The BMJ is a really bad journal and one of the ones that supported this garbage), the science on infections has been clear for decades, every infection damages us. Covid especially so it damages the immune system directly suppressing CD4 and 8 T cells, B cells and other aspects. Its not a subtle change, in Long Covid research its become increasingly hard to find controls, many people without symptoms show the same blood based markers of immune dysruption and cognitive slowing.