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.
The Tdap vaccine offers protection from three serious diseases: tetanus, diphtheria, and pertussis (whooping cough).It's the first booster designed to protect adults and adolescents from whooping cough, a very contagious disease that they're at risk for themselves and can pass on to babies.Whooping cough can result in months of coughing, cracked ribs from severe coughing spells, pneumonia, and other complications.t's the first booster designed to protect adults and adolescents from whooping cough, a very contagious disease that they're at risk for themselves and can pass on to babies. Whooping cough can result in months of coughing, cracked ribs from severe coughing spells, pneumonia, and other complications.