I haven't seen any updates since last year.  One challenge of Long Covid is that it's difficult to even diagnose who has it.
  The First Diagnostic Test for Long COVID Will Formally Launch in Europe in September
  The  simple blood test detects immune signatures specific to long COVID,  enabling it to differentiate long COVID from other diseases with similar  symptoms.
  The test will be launched in September  through a strategic partnership with a leading provider of laboratory  diagnostic services.
  The test provides greater  than 90% accuracy, based on validation studies; test performance is not  affected by emergence of different COVID-19 variants.
 
  SAN CARLOS, CA, August 31, 2022 -- The  first diagnostic designed to identify patients with long COVID has  received CE-IVD marking in Europe. It is ready for its formal launch in  countries accepting the designation in September of this year. The  simple blood test can help to objectively diagnose patients suffering  from Post-Acute Sequelae of COVID-19 (PASC), commonly known as long  COVID. Developed by IncellDx, the test will be available to prescribers  and patients in September through one of the world’s largest providers  of diagnostic services.
  A CE Mark indicates that the incellKINE  Long COVID In Vitro Diagnostic fulfills the requirements of relevant  European product directives and meets all the requirements of the  relevant recognized European harmonized performance and safety  standards.
  "With so many people in Europe and around the world  suffering from ongoing symptoms of COVID, without a diagnosis available  to confirm long COVID, we are very pleased to receive the CE Mark, and  to be launching long COVID testing in Europe next month," said Bruce  Patterson, MD, CEO of IncellDx. "Together with the support of our own  studies to better understand the underlying cause of long COVID and a  validation study from a respected global reference lab, this CE IVD mark  provides additional validation of the quality and reliability of this  diagnostic."
  The CE marking is supported by data from a validation  study conducted by one of the world’s largest providers of diagnostic  services, showing the test provides greater than 90 percent accuracy  across COVID strains. The test was developed based on clinical studies  published in the peer reviewed journal Frontiers in Immunology, which  showed that IncellDx researchers generated credible, objective disease  scores for long COVID using machine learning and artificial intelligence  to measure and analyze sets of inflammatory markers called cytokines  and chemokines. The studies also demonstrated that patients with  previous COVID-19 infection and lingering symptoms were found to have a  distinct immunologic profile characterized by patterns of inflammatory  marker expression. In a subsequent publication, IncellDx found SARS  CoV-2 S1 spike protein in monocytic reservoirs of long COVID patients up  to 15 months after acute infection. These papers can be found  here and  here.
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  Tom |