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A Survey of Vaccine Coverage Among Iranian Final-Year Medical Students

To the Editor: Medical students are at risk for exposure to and possible transmission of vaccine-preventable diseases. As they become more involved in patient care, medical students are more likely to be exposed to blood and patient secretions than are other healthcare staff. The Centers for Disease Control and Prevention strongly recommends that all healthcare workers be vaccinated against (or have documented immunity to) hepatitis B, measles, mumps, rubella, influenza, and varicella. However, many medical students in a variety of countries remain susceptible to these diseases. In Iran, there is no national vaccination program for mumps, varicella, or influenza. National vaccination programs against measles and hepatitis B were first introduced in 1961 and 1993, respectively. A national vaccination program incorporating measles and rubella was started in January 2003. Thus, compared with medical students in countries with long-standing vaccination programs for hepatitis B, measles, mumps, rubella, and varicella, Iranian medical students have a higher risk of exposure and insufficient childhood vaccine uptake. Despite the fact that medical students are among the healthcare providers who have been identified as important vectors for transmission of vaccine-preventable diseases, Iranian medical schools lack a definite policy to ensure students' immunity to vaccine-preventable diseases prior to their clinical clerkships.