This research examines how natural sugar compounds (polysaccharides) from microorganisms like bacteria, fungi and algae can help fight viral infections and boost our immune system. These compounds are safe, natural and show promise in preventing viral diseases including COVID-19. The findings impact everyday life in several ways: • These compounds could be added to foods as natural immune-boosting ingredients • They may help prevent viral infections including COVID-19 when consumed regularly • They could be developed into natural antiviral medications with fewer side effects • They may reduce our dependence on synthetic antiviral drugs • They could be used to create new functional foods and supplements for better immune health