Great mystery after one 100 years! Nature's calculation is not known. Swine flu in 1918 Why or how it came All over the world At the same time! It attacked the people of Twenties and thirtees The prime of youth Spared the infants and elderly The death toll crossed 20 million. While Swine flu is still a mystery Another mystery unfolded Corona virus after 100 years in 2019 Results in rampant damage to Organs like brain and liver