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.
An adult who's never been immunized against tetanus should complete the initial tetanus series of three tetanus shots. The first two shots are given at least four weeks apart, and the third shot is given six to 12 months after the second shot. After the initial tetanus series, booster shots are recommended every 10 years.