Sources of Hav infection 40 198393 30 可 Pr9na」 20 c9门 Day care enter 10 Foreign travell Druguse 0 Outbreak 19831984198519861987198819891990199119921993 Year Source: CDC, Viral Hepatitis Surveillance ProgramSources of HAV Infection 1983-93 Percentage of Cases Source: CDC, Viral Hepatitis Surveillance Program Year Personal contact Day care center Foreign travel Outbreak Drug use 40 30 20 10 0 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993