To understand how COVID-19 vaccines work, it helps to first look at how our bodies fight illness when germs, such as the virus that causes COVID-19, invade our bodies, they attack and multiply. This invasion, called an infection, is what causes illness. Out immune system uses several tools to fight infection. Blood contains red cells, which carry oxygen to tissues and organs, and white or immune cells.
COVID-19 vaccines help our bodies develop immunity to the virus that causes COVID-19 without us having to get the illness. Different types of vaccines work in different ways to offer protection, buyt with all types of vaccines, the body is left with a supply of "memory" T-lymphocytes as well as B-lymphocytes that will remember how to fight that virus in the future.
Currently, there are three main types of COVID-19 vaccines that are or soon will be undergoing large-scale (Phase 3) clinical trials in the United States. Below is a description on how each type of vaccine prompts our bodies to recognize and protect us from the virus that causes COVID-19:
- mRNA Vaccines: Contain material from the virus that causes COVID-19 that gives our cells instructions for how to make a harmless protein that is unique to the virus. After our cells make copies of the protein, they destroy the genetic material from the vaccine. Our bodies recognize that the protein should be there and build T-lymphocytes and B-lymphocytes that will remember how to fight the virus that causes COVID-19 if we are infected in the future.
- Protein subunit Vaccines: Include harmless pieces (proteins) of the virus that causes COVID-19 instead of the entire germ. Once vaccinated, our immune system recognizes that the proteins don't belong in the body and begins making T-lymphocytes and antibodies. if we are ever infected in the future, memory cells will recognize and fight the virus.
- Vector Vaccines: contains a weakened version of a live virus- a different virus than the one that causes COVID-19-that has genetic material from the virus that causes COVID-19 inserted in it (this is called a viral vector). Once the viral vector is inside our cells, the genetic material gives cells instructions to make a protein that is unique to the virus that causes COVID-19. Using these instructions, our cells make copies of the protein. This prompts our bodies to build T-lymphocytes and B-lymphocytes that will remember how to fight that virus if we are infected in the future.
Getting vaccinated is one of many steps you can take to protect yourself and others from COVID-19. Protection from COVID-19 is critically important because for some people, it can cause severe illness or death.
Stopping a pandemic requires using all the tools available. Vaccines work with your immune system so your body will be ready to fight the virus if you are exposed. Other steps, like masks and social distancing, help reduce your chance of being exposed to the virus or spreading it to others. Together, COVID-19 vaccination and following CDC’s recommendations to protect yourself and others will offer the best protection from COVID-19.
Click here to see if you are eligible to get the COVID-19 Vaccine!
FAQs about the COVID-19 vaccine
The U.S. Food and Drug Administration (FDA) has given emergency use authorization for three COVID-19 vaccines:
- Pfizer/BioNTech- (2 Dose three weeks apart)
- Moderna COVID-19 vaccine.- (2 Dose four weeks apart)
- Johnson and Johnson- (1 Dose)
The COVID-19 vaccine will not affect fertility. the truth is that COVID-19 vaccine encourages the body to create copies of the spike protein found on the coronavirus's surface. this "teaches" the body immune system to fight the virus that has specific spike protein on it.
Confusion arose when a false report surfaced on social media, saying that the spike protein on this coronavirus was the same as another spike protein called syncitin-1 that is involved in the growth and attachment of the placenta during pregnancy. The false report said that getting the COVID-19 vaccine would cause a woman’s body to fight this different spike protein and affect her fertility. The two spike proteins are completely different and distinct, and getting the COVID-19 vaccine will not affect the fertility of women who are seeking to become pregnant, including through in vitro fertilization methods. During the Pfizer vaccine tests, 23 women volunteers involved in the study became pregnant, and the only one who suffered a pregnancy loss had not received the actual vaccine, but a placebo.
People who have gotten sick with COVID-19 may still benefit from getting vaccinated. Due to the severe health risks associated with COVID-19 and the fact that re-infection with COVID-19 is possible, people may be advised to get a COVID-19 vaccine even if they have been sick with COVID-19 before.
Studies found that the two initial vaccines are both about 95% effective — and reported no serious or life-threatening side effects. There are many reasons why the COVID-19 vaccines could be developed so quickly. Here are just a few:
- The COVID-19 vaccines from Pfizer/BioNTech and Moderna were created with a method that has been in development for years, so the companies could start the vaccine development process early in the pandemic.
- China isolated and shared genetic information about COVID-19 promptly, so scientists could start working on vaccines.
- The vaccine developers didn’t skip any testing steps, but conducted some of the steps on an overlapping schedule to gather data faster.
- Vaccine projects had plenty of resources, as governments invested in research and/or paid for vaccines in advance.
- Some types of COVID-19 vaccines were created using messenger RNA (mRNA), which allows a faster approach than the traditional way that vaccines are made.
- Social media helped companies find and engage study volunteers, and many were willing to help with COVID-19 vaccine research.
- Because COVID-19 is so contagious and widespread, it did not take long to see if the vaccine worked for the study volunteers who were vaccinated.
- Companies began making vaccines early in the process — even before FDA authorization — so some supplies were ready when authorization occurred.
No. COVID-19 mRNA vaccines do not change or interact with your DNA in any way.
Messenger RNA vaccines—also called mRNA vaccines—are the first COVID-19 vaccines authorized for use in the United States. mRNA vaccines teach our cells how to make a protein that triggers an immune response. The mRNA from a COVID-19 vaccine never enters the nucleus of the cell, which is where our DNA is kept. This means the mRNA cannot affect or interact with our DNA in any way. Instead, COVID-19 mRNA vaccines work with the body’s natural defenses to safely develop immunity to disease. Learn more about how COVID-19 mRNA vaccines work.
At the end of the process, our bodies have learned how to protect against future infection. That immune response and making antibodies is what protects us from getting infected if the real virus enters our bodies.
Fact: One or two days of side effects after the COVID-19 vaccine means it's working.
Some inflammation or soreness at the injection site, as well as minor side effects after getting a COVID-19 vaccine is normal. Everone will have a slightly different reaction. Chills, fatigue or body aches for a day or two are signs that your body is building its immune response.
Fact: There's no microchip or tracking device of any kind in either COVID-19 vaccine.
This debunked myth morphed into a conspiracy theory after Bill Gates suggested creating a digital certificate of vaccine records. Gates, in fact, has been the top subject of COVID-19 misinformation since early in the pandemic, according to media analysis company Zignal Labs and CNBC