In June, the Food and Drug Administration approved the first 5 in 1 vaccine. The vaccine, called Pentacel, immunizes against diphtheria, tetanus, pertussis, polio and haemophilus influenzae type B. The vaccine combo means children get fewer shots and parents spend less money on vaccinations. The Centers for Disease Control and Prevention recommend 23 vaccine injections for kids by the time they turn 2 years old. Using Pentacel would reduce the number of shots required by seven so children would need just 16 shots.