The provided text includes references to various studies on viral gastroenteritis outbreaks, focusing on Norwalk-like viruses and other small round-structured viruses. These studies highlight the role of person-to-person transmission, contaminated water, food handlers, and cruise ships in spreading viral gastroenteritis. They also discuss the application of molecular diagnostics in identifying the etiologic agents and transmission patterns. Additionally, the text mentions the correlation between immune responses and specific viral strains, as well as the importance of laboratory specimen collection during outbreaks. The text also discusses the rising incidence of hepatocellular carcinoma (HCC) in the United States, with a significant increase in incidence rates from 1976 to 1995. The rate among African American men was notably higher than among white men. The increase is attributed to hepatitis B virus (HBV) and hepatitis C virus (HCV) infections, which have long latency periods. Alcoholic cirrhosis, a third risk factor, is declining. Globally, the rate of HCC is closely linked to the prevalence of chronic HBV carriers, with a 100-fold increased risk in those with persistent HBV infection. Chronic HCV is also a risk factor for HCC. The text references two studies that support these findings.The provided text includes references to various studies on viral gastroenteritis outbreaks, focusing on Norwalk-like viruses and other small round-structured viruses. These studies highlight the role of person-to-person transmission, contaminated water, food handlers, and cruise ships in spreading viral gastroenteritis. They also discuss the application of molecular diagnostics in identifying the etiologic agents and transmission patterns. Additionally, the text mentions the correlation between immune responses and specific viral strains, as well as the importance of laboratory specimen collection during outbreaks. The text also discusses the rising incidence of hepatocellular carcinoma (HCC) in the United States, with a significant increase in incidence rates from 1976 to 1995. The rate among African American men was notably higher than among white men. The increase is attributed to hepatitis B virus (HBV) and hepatitis C virus (HCV) infections, which have long latency periods. Alcoholic cirrhosis, a third risk factor, is declining. Globally, the rate of HCC is closely linked to the prevalence of chronic HBV carriers, with a 100-fold increased risk in those with persistent HBV infection. Chronic HCV is also a risk factor for HCC. The text references two studies that support these findings.