Background: COVID19 still not under human medical control, still killing people every were, virus lethality is unpredictable, time needed till having an effective drug or vaccine is still unclear, and humanity economic resources are being exhausted. Low-cost COVID-19 screening program is of great importance all over the world due to early general inventory of COVID-19 +ve patients before the onset of pulmonary symptoms in highly susceptible population (city, village, hospital clinics…etc). Hypothesis: Blood picture changes in COVID-19 +ve patients as lymphocytopenia , increased D-dimer>1000 µg/L(>1µg/ml)  and mild elevation of serum Ferritin [early (survivors >400µg/L)and late (non-survivors >1000 µg/L)] occur early prior to pulmonary symptoms, and portable chest X ray hence can be used as reliable indicator for early COVID-19 diagnosis and this may save the use of CT chest as well as swab-PCR.
Conclusion: We can screen out COVID 19 endemic zones and run the outpatient clinics in hospitals with the least coast during the period of lack of effective drug or vaccine against COVID 19 epidemic.