Yes, the 5-in-1 combination vaccine (which protects against diphtheria, tetanus, pertussis, polio, and Hib) is highly safe and very effective for babies. It is thoroughly tested and recommended globally by pediatricians. This combination vaccine is highly beneficial because it reduces the number of painful injections your baby needs to stay protected. Like all vaccines, it may cause mild, temporary side effects such as a low-grade fever, irritability, or slight soreness and redness at the injection site. These symptoms are completely normal, indicate the immune system is building defense, and typically resolve within two days. Always consult your pediatrician for a personalized immunization schedule.