Nitazoxanide versus Vancomycin in Clostridium difficile Infection: A Randomized, Double Blind Study
Aging and Infectious Diseases: Immunosenescence and Vaccination in Nursing Home Residents
Editorial Commentary: Implications of Antiviral Resistance of Influenza Viruses
Editorial Commentary: How Medicine Advances
The Role of Breast Feeding in the Prevention of Helicobacter pylori Infection: A Systematic Review

Measurement of Airborne Influenza Virus in a Hospital Emergency Department
Nitazoxanide versus Vancomycin in Clostridium difficile Infection: A Randomized, Double Blind Study

Better Adherence with Once Daily Antiretroviral Regimens: A Meta Analysis
Effects of Omeprazole on Plasma Levels of Raltegravir

Aging and Infectious Diseases: Immunosenescence and Vaccination in Nursing Home Residents
HIV/AIDS: Pregnancy and Optimal Care of HIV Infected Patients Brenna L. Anderson and Susan Cu Uvin
Vaccines: Vaccines and Autism: A Tale of Shifting Hypotheses

Vaginal Ulceration and Local Lymphadenopathy in an African Immigrant: (Answer on pages 493–4)