Older article i found interestinghttps://www.frontiersin.org/articles/10.3389/fimmu.2020.01446/full "Complete blood picture of COVID-19 patients usually shows lymphopenia with or without total leukopenia. A lymphocyte count <1.0 109/l has been associated with severe disease (18). a recent research has reported that severe cases of covid-19 tend to have higher neutrophil to lymphocyte ratio (nlr). nlr is calculated from a routine blood picture by dividing the absolute neutrophil count by the absolute lymphocyte count and indicates a patient's overall inflammatory status". ="" 109/l="" has="" been="" associated="" with="" severe="" disease="" (18).="" a="" recent="" research="" has="" reported="" that="" severe="" cases="" of="" covid-19="" tend="" to="" have="" higher="" neutrophil="" to="" lymphocyte="" ratio="" (nlr).="" nlr="" is="" calculated="" from="" a="" routine="" blood="" picture="" by="" dividing="" the="" absolute="" neutrophil="" count="" by="" the="" absolute="" lymphocyte="" count="" and="" indicates="" a="" patient's="" overall="" inflammatory="" status".="">1.0 109/l has been associated with severe disease (18). a recent research has reported that severe cases of covid-19 tend to have higher neutrophil to lymphocyte ratio (nlr). nlr is calculated from a routine blood picture by dividing the absolute neutrophil count by the absolute lymphocyte count and indicates a patient's overall inflammatory status". >