R C Presilla

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In order to find out the variations in the Prevalence of HAV ab and identify the persons who should be vaccinated against Hepatitis A virus, we assessed HAV ab to 200 patients without any occupational risk. They were classified by their socioeconomic status; in the following categoris: High (level I n = 0); Medium-High (level II n = 50); Medium-Low (level(More)
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