The first year of a baby’s life is full of rapid changes and exciting milestones. Babies grow really fast during this time; most double their birth weight by around 6 months, and triple it by the time ...

Will a positive purified protein derivative (PPD) test return to normal, i.e., become nonreactive, after isoniazid treatment? —Maj. James R. Northern Sr, DO, Mexico, Mo. In an immunocompetent patient, ...