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(a) Potential first- and second-line NRTI backbones for HIV-2 and dual infection
| First-line | Second-line |
|---|---|
| AZT/3TC | TDF/AZT/3TC or FTC |
| TDF/FTC or 3TC* | TDF/AZT/3TC or FTC |
| ABC/3TC | TDF/AZT/3TC or FTC |
*FTC and 3TC are assumed to be essentially equivalent in the table, despite FTC's possible superiority and 3TC's possibly lower cost.
