ALT Hart goes further. She writes of “the clear science” linking chronic stress to the onset of long Covid, ME and chronic fatigue syndrome. Yet the science on long Covid is very new and often divided. Hart says, of all these conditions, “the cause and the solution are in the brain’s heightened stress response.” She leaves no room for dissent. Where has this assertion come from? Without careful citation of sources, as, say, one finds in Dr Chris van Tulleken’s recent Ultra Processed People, we have to take Hart’s word for it.