Laser - Design. 1  Gain medium. 2  Laser pumping energy. 3  High reflector. 4  Output coupler. 5  Laser beam. 6  A laser consists of a gain medium, a mechanism to energize it, and something to provide optical feedback. 7  For the gain medium to amplify light, it needs to be supplied with energy in a process called pumping.
Children should get a booster vaccine called Tdap (which protects against tetanus, diphtheria, and whooping cough) at 11 or 12 years of age. Adults need a booster called the Td vaccine (for tetanus and diphtheria) every 10 years. Adults should also receive a one-time shot of the Tdap vaccine in place of one Td shot. Tetanus is a serious disease caused by a toxin (poison) made by bacteria.
In this article. DTaP is a vaccine that helps children younger than age 7 develop immunity to three deadly diseases caused by bacteria: diphtheria, tetanus, and whooping cough (pertussis). Tdap is a booster immunization given at age 11 that offers continued protection from those diseases for adolescents and adults.n this article. DTaP is a vaccine that helps children younger than age 7 develop immunity to three deadly diseases caused by bacteria: diphtheria, tetanus, and whooping cough (pertussis). Tdap is a booster immunization given at age 11 that offers continued protection from those diseases for adolescents and adults.