Pentavalent vaccine is a combination of polio vaccine, DPT vaccine and Hib vaccine. Pentavalent vaccine can prevent 5 diseases, including diphtheria, pertussis, tetanus, Hib and polio. Pentavalent vaccine has the same effect as three separate vaccines, reducing the number of vaccinations and adverse reactions, but still achieving a certain preventive effect. The Pentavalent Vaccine is currently available for infants and young children and is effective in preventing infection of these diseases. It is recommended that the vaccine be administered according to local vaccination protocols. However, if there is a history of severe allergies, fever and other conditions can not be vaccinated.