Decision thresholds for transmission of single and multiple HIV-1 variants

<p>Note: The following decision strategy was applied for each analysis of subject's maximum and mean distances within <i>gag</i> and <i>env</i>: A sample with value exceeding the “Multi” threshold was associated with transmission of <i>multiple</i> HIV-1 variants. A sample with value smaller than the “Single” threshold was associated with transmission of a <i>single</i> HIV-1 variant. A sample with value exceeding the “Single” threshold but less than the “Multi” threshold was considered <i>undetermined</i> in relation to multiplicity of HIV-1 transmission.