Immune memory persistence is well documented for hepatitis A vaccines

Population seroprotection against hepatitis a virus in Israel 18 years after introduction of inactivated vaccine into the routine childhood vaccination schedule

(2020) Inbal Galor et al.   VACCINE

Immunogenicity of the hepatitis A vaccine 20 years after infant immunization

(2020) E. Mosites et al.   VACCINE

Serological responses to revaccination with hepatitis A virus (HAV) vaccines among HIV-positive individuals whose anti-HAV antibody waned after primary vaccination

(2018) Guan-Jhou Chen et al.   LIVER INTERNATIONAL

Immune memory at 17-years of follow-up of a single dose of live attenuated hepatitis A vaccine

(2018) Ying Chen et al.   VACCINE

Seven-year follow-up of the immune response after one or 2 doses of inactivated hepatitis A vaccine given at 1 year of age in the Mendoza Province of Argentina

(2017) Carlos Espul et al.   Human Vaccines & Immunotherapeutics

Single-Dose Hepatitis A Immunization: 7.5-Year Observational Pilot Study in Nicaraguan Children to Assess Protective Effectiveness and Humoral Immune Memory Response

(2016) Orlando Mayorga et al.   JOURNAL OF INFECTIOUS DISEASES

A single dose of inactivated hepatitis A vaccine promotes HAV-specific memory cellular response similar to that induced by a natural infection

(2015) Juliana Gil Melgaço et al.   VACCINE

Long-term antibody persistence after vaccination with a 2-dose Havrix ™ (inactivated hepatitis A vaccine): 20 years of observed data, and long-term model-based predictions

(2015) Heidi Theeten et al.   VACCINE

Single-dose administration of inactivated hepatitis A vaccination in the context of hepatitis A vaccine recommendations

(2013) J.J. Ott et al.   INTERNATIONAL JOURNAL OF INFECTIOUS DISEASES

Successful Memory Response following a Booster Dose with a Virosome-Formulated Hepatitis A Vaccine Delayed Up to 11 Years

(2011) Christoph Hatz et al.   Clinical and Vaccine Immunology

Antibody Persistence and Immune Memory 4 Years Post‐Vaccination With Combined Hepatitis A and B Vaccine in Adults Aged Over 40 Years

(2011) Roman Chlibek et al.   JOURNAL OF TRAVEL MEDICINE

LONG-TERM IMMUNOGENICITY OF TWO PEDIATRIC DOSES OF COMBINED HEPATITIS A AND B OR MONOVALENT HEPATITIS B VACCINE IN 8 TO 10-YEAR-OLD CHILDREN AND THE EFFECT OF A CHALLENGE DOSE GIVEN SEVEN YEARS LATER

(2009) Vladimir Gilca et al.   PEDIATRIC INFECTIOUS DISEASE JOURNAL