“Collection of the control group was essential for the evaluation of seropositivity among the general female population.”

“Of the 1,995 HIV-infected patients eligible for the study, 873 had hepatitis C seropositivity.”

“The dependent variable was presence of pH1N1 seropositivity vs. no seropositivity.”

“In endemic areas such as Africa, Asia, and South America there is a relatively high seroprevalence of antibodies to the organism.”

“Andaman Islands is a highly endemic area for leptospirosis 4,5-8 with more than 50 per cent seroprevalence.”

“In addition, because HIV infection was a risk factor for serious adverse reactions, incidence may be higher in populations with higher HIV seroprevalence.”