Pertussis is a very contagious illness which spreads through coughing or sneezing. It can cause fever, breathing difficulties, pneumonias and even convulsions in newborn babies. All parents and caretakers of newborn babies who would come in close contact with the newborn should receive pertussis vaccination to prevent spread of infection to the newborn. Therefore it is advisable that all such adults should be given Tdap at least two weeks before they come in contact with the newborn.Instaead of your usual shot of tetanus booster (Td )you can take Tdap.Hope it helps.
Take care and good luck!