U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES NATIONAL VACCINE PROGRAM OFFICE
U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES NATIONAL VACCINE PROGRAM OFFICE
INTRODUCTION
Despite the widespread availability of safe and effective vaccines, adult vaccination
rates remain low in the United States and far below Healthy People 2020 targets.
2,3
Vaccine-preventable diseases take a heavy toll on adults age 18 and older. The health
and productivity costs of influenza alone are estimated to be as high as $87 billion per
year.
4
The Centers for Disease Control and Prevention (CDC) estimates that, among
U.S. adults, each year there are roughly 40,000 cases and 4,000 deaths attributable to
invasive pneumococcal disease,
5
between 3,000 and 49,000 deaths due to seasonal
influenza,
6
9,000 reported cases of pertussis,
7
approximately 3,000 reported cases of
acute hepatitis B,
8
and about one million cases of herpes zoster.
9
Adults have been
directly affected in recent outbreaks of vaccine-preventable diseases, such as measles.
Unvaccinated adults have also unknowingly spread vaccine-preventable diseases (e.g.,
to small children who are too young to be immunized); thus, limited vaccination of adults
not only impacts adults directly but also has consequences for their families and
communities. With the aging of the U.S. population, the public health impact of vaccine-
preventable diseases and their complications in adults is likely to grow. The diminishing
function of the aging immune system reduces the immune response to vaccination and
underscores the need to develop more effective products for older adults.
10
The CDC and its Advisory Committee on Immunization Practices (ACIP) currently
recommend 13 different vaccines for adults age 18 and older to prevent a host of
diseases (Appendix 1).
10
The adult vaccine schedule, which was first published in 2002,
now includes vaccines that are universally recommended (e.g., influenza), those that
are recommended for certain age groups (e.g., human papilloma virus [HPV]), and
those that are targeted to individuals with specific risk factors (e.g., hepatitis A and
B).
1,10
The adult schedule also includes catch-up vaccinations for those adults who
never initiated or did not complete a multidose series when vaccination was first
recommended during childhood. Catch-up vaccinations include such vaccines as
measles, mumps, and rubella and varicella, which are routinely recommended for
administration during childhood.
As shown in Table 1, despite the health benefits that result from implementation of
ACIP/CDC recommendations, adults continue to be vaccinated at low and variable
rates. In contrast, childhood vaccination rates in the United States typically exceed 90
percent. The success of childhood vaccination can be attributed to many factors unique
to pediatric vaccination, such as state laws requiring vaccination for school entry and
the coordinated public health infrastructure established by the Vaccines for Children
program (VFC), a federally funded program to provide free vaccines to children who are
eligible for Medicaid, uninsured, under insured, or American Indian or Alaska Native.
11
NATIONAL ADULT IMMUNIZATION PLAN
1