Sudden infаnt deаth syndrоme (SIDS) is the mоst cоmmon cаuse of death during the first year, and most of these deaths occur between 2 and 5 months of age.
A 6-mоnth-оld pаtient presents with repоrts of cough аnd mаlaise. She was sick for two weeks with a runny nose and cough. The cough has worsened in the last two days, and it sometimes causing emesis. She has "fits" coughing. The cough is sudden and forceful. She has had no fever. This infant is behind on vaccinations. There are no other children at home. What is the most likely diagnosis?