An unusual case of postpartum dyspnea.

A 40-year-old South Asian woman was admitted in active labor at 38 weeks' gestation. She had an unremarkable medical history with routine prenatal care, negative HIV testing results, and an uneventful pregnancy. She received a Bacillus Calmette-Guérin vaccine during childhood and reportedly had a subsequent positive purified protein-derivative test result 1 year prior to conception. She never smoked and had seven normal term pregnancies.