To be licensed, vaccines must go through many years of research, and they have to pass certain standards. The vaccine process includes experts, including public health, epidemiology, immunology, and statistics.. Sometimes researchers disagree about who to include in vaccine trials, it 's a very important decision when deciding. To properly test a vaccines, a clinical trial is usually a big part in it. Historyofvaccines.org states that “failing to provide any option can be a difficult decision when the vaccine can potentially prevent a serious, untreatable, or fatal infection, however. For instance, TB vaccine researchers have struggled to devise ethical control group procedures. Existing TB vaccines, called Bacillus Calmette-Guérin (BCG) vaccines,…show more content… Some are life-threatening. Vaccinations, are kind of essential. They protect against things like measles, mumps, hepatitis B, Influenza, tetanus, and whooping cough. Immunizations are important for adults as well as (children). Your immune system helps your body fight germs by producing antibodies to fight them off. . Vaccines contain germs that have been killed or weakened like stated in paragraph one. When given to a healthy person, the vaccine triggers the immune system to respond and then prevent you from acquiring the disease. Before vaccines, people became immune only by getting a disease and beating it, which was not always the case. Immunizations are an easier way to become immune to the disease. Some parents believe that vaccines are the best thing that they could do for their child(ren). According to the CDC website, 84.2% of children 19-35 months received the Diphtheria, Tetanus,and the Pertussis vaccination, 93.3% received a Polio vaccination, 91.5% received a Measles, Mumps,and Rubella vaccination, 82.0% received the vaccine Haemophilus influenzae type bation, 91.6% received a Hepatitis B vaccination, 91.0% received the Chickenpox vaccination and 82.9% received the Pneumococcal conjugate vaccine. There are many reasons why babies, children, adults and elders should be vaccinated. Diseases (like polio) are becoming rare in the U.S. Of course, they are becoming rare largely because we have been using vaccination to defend against them. Unless we can completely stop the disease, it is extremely important to keep vaccinating. The CDC also states that even if there are only a few cases of the disease today, if we take away the protection given by vaccination, more and more people will become infected and will spread disease to others. Soon we will undo the progress we have made over the years. Once you stop vaccinating with in the states, diseases that you no longer see will make a comeback.