Figure 1 :Comparison of mean and median absolute CD4 counts in normal healthy individuals as reported from different parts of India: ( a) Comparison of mean CD4 counts, ( b) comparison of median CD4 counts from different regions of India. Mean/median CD4 counts in cells/μl is plotted on Y axis and studies done in different regions of India are plotted on Xaxis. Red and green colours indicate CD4 values from females and males respectively. The black colours indicate CD4 values irrespective of the gender. The number above each value indicates number of samples tested to get the value in the study. Source of data: Refs. 18, 20, 36, 61, 63-71, 73-76.