Travel to Health

Researchers at the 4th Long COVID International Conference presented an increasingly clear—yet complex—picture of the condition's underlying biology. Rather than pointing to a single root cause, the findings suggest Long COVID is driven by a web of interconnected mechanisms that can persist for years after an acute infection, potentially sorting patients into distinct biological subtypes despite overlapping symptoms. Lingering Viral Reservoirs A central focus of the conference was whether traces of SARS-CoV-2 remain in the body after the initial infection. Multiple research teams reported detecting viral RNA, proteins, and persistent antigens in tissue reservoirs including the gut, heart, and bone marrow, as well as in blood-forming megakaryocytes and circulating platelets. These findings suggest that remnants of the virus may persist long after the acute phase of illness, even without evidence of ongoing contagious infection. The following conference abstracts provide evidence th...