 The study found that vaccination coverage among his positive adults in northern Greece was insufficient for hepatitis A virus, HAV, hepatitis B virus, HBV, seasonal influenza virus, and pneumococcal disease. Factors contributing to poor vaccine compliance include low educational level, lack of insurance coverage, and economic distress. The recommendation for vaccination after the onset of the economic crisis in 2010 led to poor compliance to vaccination against HBV, HAV, and pneumococcal disease but not against influenza. This article was authored by Olga Tsakuridou, Adamantini Georgiou, Simeon Naham, and others.