In today's modern life, due to climate, environmental dust and diseases, many people are facing health problems and infectious diseases. Many advocates say vaccination is safe and represents one of the greatest scientific advances in preventative health in the 20th century. However, there have been many different discussions between the advantages and disadvantages of this useful prevention method. However, due to many arguments and evidence supporting patient prevention cases by the Centers for Disease Control and Prevention (CDC), the World Health Organization (WHO), or in any practical health matter, the Vaccines were invented to prevent diseases and infectious diseases because the effective means and the benefits are much greater. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get Original Essay First of all, vaccine is an amount of medicine mixed with different ingredients such as antibodies or small pathogenic organisms in different uses for diseases. The role of a vaccine is to take that amount from an injection into our body for “good health” and use it to create healthy, active immunity against the body's resistance. There are many ways to use this “magical prevention” in the patient's body. For example, the original and classic way of using vaccines is injection, however, due to modern technological advances in this century, in some cases people can “administer” the amount of vaccine directly into the mouth or via nasal spray. To be specific, there are few diseases for which people may require oral vaccines such as rotavirus or polio. However, by entering the number of oral pathogens it is possible for the live weakened virus to be active in our bodies again. When taken orally, there are only small amounts of pathogens or medicines, but they can enter our body and be absorbed quickly. However, the oral vaccine is not useful enough for the patient because not all vaccines can be directly oral and most can be injectable. Moving on to the nasal spray, it is only used to replace flu vaccines and is made from weakened flu vaccines. The instructions for using the nasal spray are very simple, the doctor can spray into the patient's nose, the medicine can pass through the nose to the body to protect it from the flu season which can be easily affected. In this case, the level of protection between nasal spray and flu vaccine is the same and safe enough for patients, it is up to each person to decide whether they want to choose different methods of insertion for flu disease. Moving on to infectious diseases, this type of illness caused by viruses or small organisms passes directly through a body to create symptoms that range from normal to deadly. Some specific infectious diseases such as malaria, HIV, malaria and yellow fever can affect the entire body causing many symptoms in patients. Particularly, tuberculosis is a type of respiratory infectious disease, everyone must check the tuberculosis test to know whether they are already suffering from tuberculosis or not. Since BCG known as Bacillus Calmette-Guerin is a vaccine against tuberculosis, it can create active immunity against this disease. Secondly, our powerful prevention method can save the lives of many children from different types of diseases or infections. Some serious diseases can kill thousands of children because a child's immune system needs certain pathogens or antibodiesin vaccines to protect your body and health from the natural environment, disease or infection. According to the American Academy of Pediatrics, it states that most childhood vaccines are 90%-99% effective in preventing disease.[1] “The Centers for Disease Control (CDC) estimated that 732,000 American children were saved from death and that 322 million cases of childhood disease were prevented between 1994 and 2014 by vaccination.”[2] For example, there are some diseases such as polio, pneumonia, chickenpox, meningococcal, mumps and rotavirus that really need vaccines. To be concise, polio is a type of disease that can spread from person to person because the polio virus lives in an infected person, enters the body, and comes into direct contact with feces. Sometimes the poliovirus can infect a normal person with a small amount of fluid through coughing or sneezing. Therefore not only children need to get vaccinated to protect their health, but also adults, everyone needs to prepare their body against this poliovirus. Because the effect of the poliovirus on infected people can lead to paralysis that prevents some or all parts of the body from moving. Third, vaccines are effective means of preventing people from various diseases due to many shreds of evidence for different patient cases. “Accordingly, WHO estimates that in 2003, 38.3 million cases and 607,000 deaths were prevented through the use of pertussis vaccination”[3]. most deaths in countries with low immunization rates and high mortality rates. Further gains can be achieved by increasing coverage with three doses of diphtheria, tetanus and pertussis vaccine during childhood and the provision of booster doses, if appropriate”.[4] The reason why vaccines are effective because it is carefully examined and checked by doctors, scientists or hospitals before administering them to patients. Furthermore, talking about vaccine safety concerns what ingredients people use and how they activate in our body against diseases. One of the most common ingredients used by scientists or doctors for vaccine is thimerosal. This type of element involved in vaccines that contained mercury was used for multidose vials for patients. Because the term multidose vials implies adding additional dose to prevent the growth of germs or bacteria that may remain when a syringe needle enters a vial while a vaccine is being prepared for administration. According to the January – February (2012) Journal of Pediatric Psychology by Barile JP, Kuperminc GP, Weintraub ES, Mink JW and Thompson WW on the study of brain function, behavior, language, coordination and thimerosal.[5] “This study evaluated whether prenatal thimerosal exposure or thimerosal exposure between birth and 7 months of age was associated with seven specific neuropsychological outcomes in children aged 7 to 10 years.”[6] After l 'investigation, the result obtained no positive connection with thimerosal that affected the function of the brain or body parts, memory, behavior or language of children. As a result, they can demonstrate that thimerosal is not a toxic ingredient in vaccines, but simply a preservative, preventing contamination, that has been used in vaccines for decades.[7] Fourth, the important role of vaccinated people against the contagion of various diseases has been reduced. This leads us to understand that herd immunity is related to vaccination. Herd immunity is a term that means keeping away disease infection for both vaccinated people and.