For newborns exposed to HIV in utero, the recommended duration of combination antiretroviral prophylaxis is how long?

For newborns exposed to HIV in utero, the recommended duration of combination antiretroviral prophylaxis is how long?

• A. 12 weeks
• B. 6 weeks
• C. 2 weeks
• D. 18 weeks

Answer: (B)

The key idea is to protect the newborn during the highest risk period for establishing infection after birth by keeping the virus from replicating with a sustained antiviral presence. A six-week course of combination antiretroviral prophylaxis provides adequate drug exposure through the early postnatal window when vertical transmission could occur and when the infant’s immune system is still developing. This duration has been studied and incorporated into guidelines because it effectively reduces transmission risk without exposing the infant to unnecessary prolonged therapy and toxicity. Shorter durations, such as two weeks, may leave a gap where infection could take hold, while longer durations don’t add meaningful preventive benefit and increase potential adverse effects and adherence challenges. The prophylaxis should be started promptly after birth and continued for the full six weeks, with ongoing HIV testing as recommended to confirm the infant’s status.

The key idea is to protect the newborn during the highest risk period for establishing infection after birth by keeping the virus from replicating with a sustained antiviral presence. A six-week course of combination antiretroviral prophylaxis provides adequate drug exposure through the early postnatal window when vertical transmission could occur and when the infant’s immune system is still developing. This duration has been studied and incorporated into guidelines because it effectively reduces transmission risk without exposing the infant to unnecessary prolonged therapy and toxicity. Shorter durations, such as two weeks, may leave a gap where infection could take hold, while longer durations don’t add meaningful preventive benefit and increase potential adverse effects and adherence challenges. The prophylaxis should be started promptly after birth and continued for the full six weeks, with ongoing HIV testing as recommended to confirm the infant’s status.