Now that there are licensed and recommended vaccines against COVID-19 in the United States, accurate information about vaccines is critical.
Can a COVID-19 vaccine make me sick with COVID-19?
No. None of the authorized and recommended COVID-19 vaccines or COVID-19 vaccines currently in development in the United States contain the live virus that causes COVID-19. This means that a COVID-19 vaccine cannot make you sick with COVID-19.
There are different types of vaccines in development. All of them teach our immune systems how to recognize and fight the virus that causes COVID-19. Sometimes this process can produce symptoms, such as fever. These symptoms are normal and are a sign that the body is building protection against the virus that causes COVID-19. Learn more about how COVID-19 vaccines work.
It typically takes a few weeks for the body to build immunity (protection against the virus that causes COVID-19) after vaccination. That means it’s possible a person could be infected with the virus that causes COVID-19 just before or just after vaccination and still get sick. Esto se debe a que la vacuna no tuvo suficiente tiempo para generar protección.
After getting a COVID-19 vaccine, will I test positive for COVID-19 on a viral test?
No. Neither the recently authorized and recommended vaccines nor the other COVID-19 vaccines currently in clinical trials in the United States can cause you to test positive on las pruebas virales, which are used to see if you have a current infection.
If your body develops an immune response—the goal of vaccination—there is a possibility you may test positive on some las pruebas de anticuerpos. Antibody tests indicate you had a previous infection and that you may have some level of protection against the virus. Right now, experts are looking at how the COVID-19 vaccine might affect the results of antibody tests.
If I have already had COVID-19 and recovered, do I still need to get vaccinated with a COVID-19 vaccine?
Yes. Due to the severe health risks associated with COVID-19 and the fact that re-infection with COVID-19 is possible, vaccine should be offered to you regardless of whether you already had COVID-19 infection. CDC is providing recommendations to federal, state, and local governments about who should be vaccinated first.
At the moment, experts do not know how much protection time people who get sick have once they recover from COVID-19. The immunity that a person develops after an infection, known as natural immunity, varies from person to person. There is some initial evidence to suggest that natural immunity might not last long.
We won’t know how long immunity produced by vaccination lasts until we have more data on how well the vaccines work.
Both natural immunity and vaccine-induced immunity are important aspects of COVID-19 that experts are trying to learn more about, and the CDC will keep the public informed as new evidence becomes available.
Will a COVID-19 vaccination protect me from getting sick with COVID-19?
Yes. COVID-19 vaccination works by teaching your immune system how to recognize and fight the virus that causes COVID-19, and this protects you from getting sick with COVID-19.
Being protected from getting sick is important because even though many people with COVID-19 have only a mild illness, others may get a enfermedad grave, have long-term health effects, or even die. There is no way to know how COVID-19 will affect you, even if you don’t have an increased risk of developing severe complications. Conozca más sobre how COVID-19 vaccines work.
Will a COVID-19 vaccine alter my DNA?
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. Aprenda más sobre cómo actúan las vacunas ARNm contra el COVID-19.
By the end of the process, our bodies will have learned how to protect themselves against future infections. That immune response and making antibodies is what protects us from getting infected if the real virus enters our bodies.