A chromosome (from Greek: ÏÏá¿¶Î¼Î± color and Ïá¿¶Î¼Î± body) is a packaged and organized structure containing most of the DNA of a living organism.
Diphtheria, tetanus and pertussis are prevented by a childhood vaccine, called DTaP, and a newer vaccine for adolescents and adults, called Tdap.
Another shot is usually administered between the ages of 15 and 18 months, and again between the ages of 4 and 6. But these tetanus shots guard against disease only for so long, requiring adults to have repeated booster shots at least every 10 years. The 10-year duration of the tetanus shot requires vaccination against the clostridium tetani bacteria several times during an individual's life span.