Table 1.

Required and Optional Survey Variables

Required variables:

1. Date of birth (if not available, age of child in months at time of blood draw)

2. Sex

3. Site name where DBS was collected

4. Site type where DBS was collected

5. Date of DBS collection

6. Date DBS frozen at −20°C or −70°C

7. Child receiving ART (not PMTCT) at time of specimen collection (yes/no)

8. Date of PCR testing

9. Date of genotyping

Optional variables:

1. Exposure to breastfeeding at time of specimen collection

2. Name of ARV drugs received by mother antepartum/intrapartum/postpartum/during breastfeeding

3. Name of ARV drugs received by infant/child postpartum/during breastfeeding

Abbreviations: ART, antiretroviral therapy; ARV, antiretroviral; DBS, dried blood spot; PCR, polymerase chain reaction; PMTCT, prevention of mother-to-child transmission.