Just a couple of weeks ago your worked offered flu shots to every employee who wanted one. Therefore, you decide to get one but one of you co-workers decide not. They are in the same position as you they are in bed sick with the flu. After a week has gone by, you are back at work earning money, while they are still in bed all because you had got your flu shot. When you get the vaccine, they inject a germ that is a strain of the weak or dead of the disease. This causes your antibodies to attack the foreign invader. While the body is attacking it, the antibodies are also making a memory of that disease (Gard). So the flu you had you fought a little before and your body knew how to react to the pathogens. When your co-worker was not so lucky and is fighting harder to attack it on their