I think the big hope with a lot of things is long covid, because it's causing a lot of people to have a whole range of symptoms previously attributed to people seen variously as faking it, having psychosomatic disorders, imagining it etc.
That being said, some of this sort of thing goes round in circles. I want to say something about inflammation and mental health problems for comparison.
Years ago, some researchers spotted a link between schizophrenia and growing up in contact with cats. No, seriously. Further research suggested that this wasn't just contact with cats, it was contact with cat litter in flats and with cat mess in sandpits and play areas. That maps onto the social demographics more likely to develop schizophrenia, e.g. immigrant (not particular ethnic demographic), poor, otherwise socially excluded etc.
But it was dismissed as twaddle. After all, the drug companies wanted to push major tranquillisers as antipsychotics, and relatives, who'd set up the National Schizophrenia Fellowship (now Rethink), seen often as a DPO, but not set up as one, were happy to plug the notion that schizophrenia and other conditions involving psychosis (i.e. believing things your psychiatrist doesn't) was a dopamine problemnot connected with other conditions and needing drugs. This acted as a fightback against the schizophrenogenic parent concept.
Ah, but drug companies are running out of variations on a range of existing psychotropic pills such as antipsychotics, mood-stabilisers and antidepressants. Oh gosh, guess what, they've now apparently suddenly discovered that the immune system might be relevant to mental illness. How coincidental they've got a range of anti-inflammatory pills they can sell.
That does not mean that I think the immune system isn't responsible for a hell of a lot more than it was previously given credit for, but rather that I'm concerned that if the drug companies run out of new medications with anti-inflammatory properties, they'll push us away from this understanding, which I believe is very significant.
Ironically, mood-stabilisers that I've been on for years, of the sort that are also used for epilepsy, have anti-inflammatory properties, to the extent that one of them is being used for some covid-19 cases to damp down the excessive immune response, the cytokine storm.
On a lighter note about those pills - I reduced the dose of one in spring 2020 and boy did the hay fever rear its ugly head! That's for someone who, on a much higher dose of that and my other medication with a very similar mechanism of action, tested as immunodeficient in 2015.
I think that whilst the relationship between lots of different conditions in the body and mind are affected by the body's immune response, we need to push hard for the research into long covid to be extended as far as possible, as widely as possible, before people with it find themselves on the 'dismissed as just skivers or imagining it' scrapheap.
We have a lot to benefit from seizing the moment, for a whole range of chronic conditions.