Table 1.

Vaccination status of students with previous infection.

	No.	Ignoreda	Anamnestic, no vaccinationb	Anamnestic, vaccinationc	Documented, no vaccinationd	Documented, vaccinatione
anti-HBc +	111	28	33	22	10	18
HBsAg +	21	4	7	4	2	4
HBeAg +	1	0	0	1	0	0

^aSubjects who do not remember if they were vaccinated.

^bSubjects without a vaccination booklet but who reported no history of vaccination.

^cSubjects without a vaccination booklet but who reported a history of vaccination.

^dSubjects submitting a vaccination booklet in which it is certified that the vaccine was not administered.

^eSubjects submitting a vaccination booklet in which it is certified that the vaccine was administered.