Hepatitis is an inflammation of liver mainly caused by the infection of hepatitis viruses as A, B and C. Chronic infection of these viruses produces liver cancer, most commonly known as the hepatocellular carcinoma (HC). This is a kind aggressive tumor formed in liver due to the infection of these viruses. Since, the understanding of these viruses with the development of hepatocellular carcinoma is essential for the future design of treatment, the present short communication highlighted the risk factors for infection and hepatocarcinogenesis of hepatitis viruses. The present paper is also an attempt to make the people aware of the fact that chronic viral hepatitis infection in human might cause liver cirrhosis and hepatocellular carcinoma developed in future.

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The present paper deals with the study of a kind of food allergy developed after the bite of Loan- star tick and the consumption of red meat in human. This is called as the alpha-gal – syndrome (AGS) allergy in human. The mammalian meat allergy (MMA) is developed due to the injection of galactose alpha- 1,3- galactose sugar molecule in the human body by a Loan- star tick.

Cytomegalovirus is a kind of herpes virus, HHV-5. It primarily causes congenital infections and the fetal abnormalities during pregnancies. Sometimes, very serious complications and consequences may occur. As human cytomegalovirus is a ubiquitous virus occurring worldwide in nature their infections are very common in human. It has got lifelong latency in human with their reactivation causing cancer in future. The present paper deals with the study of causes and consequences of disease complex and the development of cancer by primary infection and the reactivation of HCMV in human.