In summary, quality control specialists work in a wide variety of locations where they visually inspect or manually test products. Requirements vary from a high school diploma with on-the-job training to an advanced education, depending on the employer.
Most uncomplicated colds, which often lead to coughs, last between eight and nine days, but about 25 percent last two weeks, and 5-10 percent last three weeks. How quickly your cold is resolved has a lot to do with your general lifestyle habits and the state of your immune system.
I'm a RN and can tell you the best thing to do is go to a doctor and get help from him/her. this can get very bad if not worse if you don't get help from a doctor. please see your doctor now. Whooping cough can go away on its own, but it can take a long time. If yours got better in just 3 weeks, you are lucky. Treatment with antibiotics is good to prevent spread of the disease to other people.