CRP and COVID-19: A meta-analysis highlighted key blood biomarkers in COVID-19 survivors with and without post-COVID-19 syndrome.38 A high percentage of survivors with post-COVID-19 syndrome had a still raised C-reactive protein (817/1581, 51.7%), D-dimer (784/1683, 46.6%), lactate dehydrogenase (736/1549, 47.5%) and leukocytes (436/949, 45.9%).38 These biomarker elevations (D-dimer, lactate dehydrogenase, lymphocytes) correlated with organ abnormalities, lactate dehydrogenase and leucocyte elevation was linked to <6 months post-COVID-19, while D-dimer was rather associated with ⩾6 months post-COVID-19.38