There is no need to be overly nervous when an infant takes a bath after receiving the quadruple vaccine. After bathing, pay attention to keeping warm, preventing contamination of the vaccination site, and paying attention to observation. The quadruple vaccination for infants is usually a vaccine containing a combination of pertussis and Haemophilus influenzae type B. This combination of vaccines can effectively prevent whooping cough, diphtheria, tetanus, and infections caused by Haemophilus influenzae type B. The vaccine is also effective in preventing infections caused by the bacteria Hibib. After vaccination, observe that your baby is not feeling unwell after 24 hours before bathing him/her. In case of negligence, there is no need to be overly nervous if you have already bathed your baby. The vaccination site should be dried promptly to avoid localized infection and to avoid catching a cold to induce a possible cold in case it is confused with an adverse reaction to vaccination. Closely observe the vaccination site for redness, swelling, hardness and pain. After bathing the infant after the quadruple vaccination, if the baby develops fever, severe redness, swelling and pain at the vaccination site, consult a doctor promptly.