Madison Clarke
Vaccines are designed to train the body's immune system to recognize and fight viruses that cause illnesses without giving you the illness itself. They do not put a disease inside you. Instead, they teach your cells how to make a protein or a piece of a protein that triggers an immune response inside your body. This is done by tricking your body into thinking there is a pathogen inside and mimicking some infectious symptoms. For example, mRNA vaccines do not use the live virus that causes COVID-19. Instead, they instruct your body to make an immune response against COVID-19 by creating antibodies to fight it off. While vaccines can cause side effects such as fever, chills, fatigue, nausea, and pain at the injection site, these symptoms are a sign that the vaccine is doing its job and training the immune system to fight the real virus.
| Characteristics | Values |
|---|---|
| Do vaccines put a disease inside you? | No, vaccines do not put a disease inside you. Vaccines contain either inactivated or weakened viruses or bacteria. |
| How do vaccines work? | Vaccines train your body's immune system to fight back against illnesses. They do this by introducing either a weakened or inactivated germ into your body, triggering an immune response. |
| Are vaccines safe? | Vaccines go through rigorous research, testing, and safety checks before being approved for use by regulatory bodies such as the FDA. Even after approval, vaccines are continually monitored for safety. |
| What are the benefits of vaccines? | Vaccines have been one of the greatest medical success stories, eradicating or reducing the impact of many diseases, such as smallpox, polio, and measles. They protect individuals and communities from severe illnesses and can help prevent the spread of infectious diseases. |
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What You'll Learn
Vaccines do not contain the live virus
The flu vaccine is another example of a vaccine that does not contain the live virus. Most flu shots are made with inactivated or killed viruses or with only a single protein from the flu virus, which means they cannot cause the flu. However, there is an exception to this: the nasal spray flu vaccine called FluMist, which contains weakened live viruses. These viruses are designed to be too weak to make you sick but strong enough to help your body build immunity.
The AstraZeneca/Oxford COVID-19 vaccine also does not contain the live virus. Instead, it employs an adenovirus vector that typically infects chimpanzees, further diminishing safety concerns.
It is important to note that misinformation and misunderstandings about vaccines are common. For example, a clip of British Prime Minister Boris Johnson mistaking the word "vaccine" for "virus" was misrepresented online to falsely claim that the COVID-19 vaccine contains the live virus. Similarly, a private school in Florida sent a letter to parents claiming that the COVID-19 vaccine contains a live virus that can be transmitted. These claims are false, and it is always important to seek information from reliable sources, such as healthcare professionals and scientific organizations.
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Vaccines teach our cells to make a protein
Vaccines do not put a disease inside your body. They train your immune system to fight infections and prevent severe symptoms, hospitalisation, and death.
MRNA vaccines, for example, teach our cells to make a protein that triggers an immune response. This response is triggered when our cells produce a protein or just a piece of a protein. This protein is recognised by the immune system as foreign, prompting it to begin building antibodies.
The COVID-19 vaccines developed by Pfizer and Moderna use mRNA technology. This technology does not use the live virus that causes COVID-19. Instead, it teaches our cells to make the spike protein found on the surface of the SARS-CoV-2 virus. This protein is then excreted from the cells, training the immune system to recognise and respond to the virus.
Other vaccines, such as the inactivated polio vaccine and the rabies vaccine, use killed bacteria or viruses that can no longer replicate. These inactivated pathogens are introduced into our bodies to train our immune systems to recognise and fight the real pathogen.
Vaccines do not contain the disease itself but rather a modified or inactivated form of the disease-causing agent. This allows our bodies to generate an immune response without exposing us to the risks of severe illness or complications.
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Vaccines undergo rigorous testing
Vaccines do not put a disease inside your body. In fact, vaccines undergo rigorous testing to ensure they are safe before being introduced in a country's vaccine programme. Vaccines are developed to meet a public health need, whether to prevent a new disease or improve current vaccines. The development process involves collaboration between researchers, public health institutions, regulatory agencies, and pharmaceutical companies.
The testing process for vaccines is extensive and rigorous. It begins in a laboratory with scientific observations and evaluations to determine the most suitable vaccine candidate. This preclinical phase does not involve human testing but instead uses animal models to evaluate safety and potential disease prevention. Once a suitable vaccine candidate is identified, it advances to human clinical trials, which typically consist of three phases. In the first phase, a small group of adult volunteers receives the vaccine to assess its safety, confirm its ability to generate an immune response, and determine the appropriate dosage. The second phase involves administering the vaccine to a larger group of volunteers to further evaluate its safety and efficacy. Finally, the third phase assesses safety, efficacy, and potential side effects in an even larger cohort of volunteers. Each phase is carefully monitored and can take several months to complete.
During global health emergencies, such as the COVID-19 pandemic, vaccine development timelines may be accelerated without compromising safety and quality. In such cases, different phases of vaccine development may occur simultaneously, supported by additional resources and funding. However, rigorous regulatory oversight is maintained to ensure the safety and effectiveness of the vaccine. Once a vaccine completes clinical trials, it must be assessed by regulatory bodies to meet strict standards for quality, safety, and effectiveness.
It is important to note that the approval process for vaccines is stringent, and only those that pass the required tests can be brought to market. The presence of financial incentives or conflicts of interest in the vaccine development process may raise concerns about the safety of vaccines. However, regulatory bodies such as the Food and Drug Administration (FDA) and the Centers for Disease Control and Prevention (CDC) establish committees to review scientific data independently and make recommendations on vaccine safety, efficacy, and distribution.
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Vaccines create antibodies to fight disease
Vaccines do not put a disease inside you. On the contrary, they train your body to fight off harmful invaders, such as viruses and bacteria, that make you sick. These harmful invaders are called pathogens or germs. Vaccines can prevent you from getting sick with a serious illness and help stop the spread of disease.
Vaccines work by causing an immune response in your body. This immune response involves the creation of antibodies to fight off the disease. For example, the COVID-19 vaccine creates an antibody response in your body without you having to become sick with COVID-19. Similarly, the measles vaccine offers protection against the measles virus.
The process of creating antibodies can be understood through the example of mRNA technology used in the Pfizer and Moderna COVID-19 vaccines. mRNA teaches our cells to make a protein or a piece of a protein that triggers an immune response inside our bodies. This protein is recognised by the immune system as foreign, prompting it to begin building an immune response and making antibodies.
Inactivated vaccines, subunit vaccines, and mRNA vaccines do not contain anything that could infect you. Live vaccines, on the other hand, use a weakened form of the virus or bacteria that cannot make healthy people sick. However, those with compromised immune systems may be at risk of getting sick from a live vaccine.
Vaccines have been used for centuries to fight diseases, with the first modern vaccine developed for smallpox in the 1700s. Vaccination efforts have successfully eradicated smallpox and greatly reduced the threat of other diseases such as polio and measles.
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Vaccines have wiped out smallpox
Vaccines do not put a disease inside your body. In fact, vaccines are designed to protect you from diseases. Vaccines work by teaching your cells how to make a protein that triggers an immune response in your body. This immune response helps your body fight off diseases and prevents you from getting sick. In some cases, vaccines may use a weakened or inactivated form of a disease to trigger this immune response, but it is important to note that this is not the same as putting the disease inside your body.
Now, let's focus on the statement, "Vaccines have wiped out smallpox." Smallpox, caused by the variola virus, was one of the deadliest diseases known to humans, killing hundreds of millions of people over thousands of years. It did not discriminate, infecting and killing people from all walks of life, young and old, rich and poor. The symptoms were gruesome, including high fever, vomiting, mouth sores, and fluid-filled lesions all over the body. Death often came suddenly, within two weeks of infection, and survivors were often left with permanent disabilities such as blindness and infertility.
The last case of smallpox was reported in 1977, and it is now considered eradicated, thanks largely to vaccination efforts. The first vaccine was demonstrated in 1796 by Dr. Edward Jenner, who inoculated an 8-year-old boy, James Phipps, with matter from a cowpox sore. Cowpox was believed to provide protection against smallpox, and indeed, Phipps only experienced mild illness before making a full recovery. Two months later, Jenner inoculated Phipps with matter from a human smallpox sore, and he showed resistance.
The development of the smallpox vaccine was a groundbreaking achievement, and it remains the only human disease to have been eradicated through vaccination. The success in eliminating smallpox is attributed to several factors, including universal childhood immunization programs, mass vaccination campaigns, and targeted surveillance-containment strategies. The World Health Organization (WHO) played a critical role in the Intensified Smallpox Eradication Programme launched in 1967, coordinating international efforts and providing support to local health workers even during challenging political times, such as the Cold War.
The smallpox vaccine, made from a similar but less harmful virus called vaccinia, was highly effective in preventing smallpox infection. Routine smallpox vaccination stopped in the United States in 1972 after the disease was eradicated in the country. While smallpox vaccines are not currently recommended for the general public, stockpiles are maintained as an emergency reserve in various countries, including the United States, in case of a potential outbreak.
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Frequently asked questions
No, vaccines do not put a disease inside you. Vaccines contain either inactivated or weakened forms of a virus, which cannot cause disease. Vaccines teach your body how to fight off a virus by creating an immune response.
Vaccines contain antigens, which are bits of weak or dead viruses or bacteria. Antigens train your immune system to fight back faster and stronger against illness. Your body also creates antibodies to fight off the antigens in the vaccine, which means that your body will be able to quickly recognize and destroy the real germs in the future.
Vaccines go through rigorous testing and safety checks before they are licensed for use by organizations such as the U.S. Food and Drug Administration (FDA). The FDA only licenses a vaccine for use when they are convinced that the benefits outweigh any risks.
