THE EAGLES. Already Gone. Well, I heard some people talkin' just the other day. And they said you were gonna put me on a shelf. But let me tell you I got some news for you. And you'll soon find out it's true. And then you'll have to eat your lunch all by yourself. 'Cause I'm already gone. And I'm feelin' strong. I will sing this vict'ry song, woo, hoo,hoo,woo,hoo,hoo.
In medical terms, a booster dose is an extra administration of a vaccine after an earlier dose. After initial immunization, a booster injection or booster dose is a re-exposure to the immunizing antigen. It is intended to increase immunity against that antigen back to protective levels, after memory against that antigen has declined through time. For example, tetanus shot boosters are often recommended every 10 years, after which memory cells specific against tetanus have lost their function or
Brake boosters are used only on power brakes, not manual brakes. The booster's function is to give more braking power with minimal pressure on the brake pedal. If the booster is not working properly, you will still have brakes, but the brake pedal will be very hard to push. A brake booster is what gives power brakes their power. It works on vacuum from the engine. The booster pushes on the master cylinder with the pressure applied to the booster by stepping on the brake. If the engine is off, it cannot get vacuum, therefore the brakes will be hard when the engine is off.