Zika virus dynamics: Effects of inoculum dose, the innate immune response and viral interference
Fig 1
Plasma viral load measurements, in copies (cp) per ml, in rhesus macaques inoculated subcutaneously with the indicated dose of Brazilian (BR, green triangles) or Puerto Rican (PR, purple circles) ZIKV.
The limit of detection of the experimental assay is 100 RNA cp /ml, and when ZIKV was undetectable in a sample it is shown here at the limit of detection for illustrative purposes.