Introduction: Although several vaccines are being approved, no effective antiviral has been developed for Covid-19 infectious. The present investigation was aimed to increase the essential oils of Cuscuta campestris using far-red light treatment and examine the potential of crude extracts of C. campestris against selected pneumonia pathogens and covid-19. Methods: Anti-Covid-19 activity was determined in human lung cell lines and Covid-19 positive patients. Results: Results demonstrated that the aqueous extract had the highest amount of anti-Covid-19, antibiotic and antioxidant activity. The far-red light treatment increased Scoparone, cineole, Benzofuran, 2, 3-dihydro, Cinnamic acid, and Benzo[h]quinoline, 2, 4-dimethyl, which are mainly effective components against Covid-19 inflammation and pneumonia microbes. CT scan and clinical laboratory tests in a clinical case study, a 30-year-old woman who presented with severe 2019-nCoV, demonstrated that inhalation of 30 mg extract nebulized/day for seven days resulted in an improvement in consolidation and ground-glass opacity in lungs on the seventh day of treatment. Conclusion: It is hoped that this study would be led to the introduction of some compounds that could be used to formulate new and more potent anti-Covid-19 antibiotics, or other drugs of natural origin in medicine.