Kamath GR, Shah DP, Hwang LY Immune response to hepatitis B vaccination in drug using populations: a systematic review and meta-regression analysis. Vaccine. 2014 Apr 25;32(20):2265-74. doi: 10.1016/j.vaccine.2014.02.072. Review.
Lu-Yu Hwang*, Carolyn. Grimes "Human Immunodeficiency Virus, hepatitis B and C Virus infections among injecting and non-injecting drug users from inner city neighborhoods " Insight and Control of Infectious Disease in Global Scenario, Priti Kumar Roy (Ed
Shah DP, Grimes CZ, Brown E, Hwang LY Demographics, socio-behavioral factors, and drug use patterns: what matters in spontaneous HCV clearance? J Med Virol. 2012 Feb;84(2):235-41. doi: 10.1002/jmv.22271.
Tran TQ, Grimes CZ, Lai D, Troisi CL, Hwang LY Effect of age and frequency of injections on immune response to hepatitis B vaccination in drug users. Vaccine. 2012 Jan 5;30(2):342-9. doi: 10.1016/j.vaccine.2011.10.084.
An Hepatitis B Vaccine Model for HIV Vaccine Trials in Drug Users
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
