Food availability in the early stages of life may be related to later reproductive success in humans, according to research on birth and harvest records from 18th century Finland.

Close follow up of infants known to be born to HIV-infected mothers and who received BCG at birth is recommended in order to provide early identification and treatment of any BCG-related complication.

In 2004, the National Institute of Allergy and Infectious Disease followed the medical records of 835 children from birth to age one, documenting any fever-related episodes.