We know there's a lot to consider.
As the county’s two largest healthcare providers, we’ve joined together to help provide you with solid, unbiased answers to your questions about the COVID-19 vaccines. And, as always, we encourage you to talk with your healthcare provider for more information.
Getting back to the moments we miss starts with getting informed.
How do the vaccines protect me?
When we get a vaccine, it activates our immune response. This helps our bodies learn to fight off the virus without the danger of an actual infection. If we are exposed to the virus in the future, our immune system remembers how to fight it. All COVID-19 vaccines available in the United States provide significant protection against serious illness and hospitalization due to COVID-19.
The Moderna and Pfizer vaccines use messenger RNA, or mRNA. mRNA vaccines do not contain a live virus — they give our bodies instructions for how to make and fight the harmless spike-shaped proteins, protecting us from COVID-19 infection. Scientists have been studying this vaccine method for decades.
The Johnson & Johnson/Janssen vaccine is a viral vector vaccine and also does not contain a live virus. It uses a harmless adenovirus to create a spike protein that the immune system responds to, creating antibodies to protect against COVID-19.
None of these vaccines can give you COVID-19.
It takes time for your body to build immunity after vaccination, so you won’t have full protection until two weeks after your final dose.
How do we know the vaccines are safe?
The arrival of COVID-19 vaccines marked a big step toward getting back to the people, places, and things we’ve been missing for so long. But you might be hearing different things about the vaccines in the news, on social media, and from family and friends. Here’s fact-based information from medical experts and doctors that explains how we know the vaccines are safe and effective.
COVID-19 vaccines were developed safely.
The first COVID-19 vaccines began rolling out less than a year into the pandemic. Vaccine development typically takes much longer, so it’s easy to wonder how we got these vaccines so soon. But the COVID-19 vaccines have been held to the same safety standards as any other vaccine — and rigorous clinical trials have proven that they’re safe and effective.
Each COVID-19 vaccine went through the same process as any other vaccine — only faster.
The public health emergency fast-tracked vaccine development.
We knew early on that COVID-19 was extremely serious and spreading fast. The world needed a safe, effective vaccine as soon as possible. Here’s how we did it:
Unprecedented funding: The government spared no expense responding to COVID-19. The time, money, and resources dedicated to making vaccines meant multiple steps could happen at once — instead of one at a time.
Established research: COVID-19 vaccines are new, but the technology behind them is not. Research to develop new vaccines designed to address serious pandemic situations like COVID-19 has been underway for decades. So when the COVID-19 pandemic hit, scientists were able to put those technologies into practice fast, tailor them to protect against the specific virus we’re trying to fight, and develop COVID-19 vaccines more efficiently.
Widespread collaboration: Groups of scientists and medical experts around the world recognized the need to work together to create vaccines quickly. Joining forces and sharing resources helped everyone accomplish more in less time.
High numbers of research volunteers: The public was well-aware of the dangers of COVID-19. Finding clinical trial volunteers is usually a challenge, but this time researchers had a robust sample size almost immediately.
Early results: Because COVID-19 was spreading so fast, it didn’t take long for researchers to prove that the vaccines were preventing infection. While widespread exposure is never a good thing, we had robust data about safety and effectiveness much faster than usual.
Front-end manufacturing: Vaccine manufacturers typically don’t start planning for production until clinical trials are complete. With the pandemic surging, they scaled up earlier so vaccines could be produced as soon as they got approved.
Will I have side effects from the vaccines?
COVID-19 vaccine side effects are usually minor, if you have any at all. Like most vaccines, the ones for COVID-19 can produce minor side effects that go away in a day or two. This is a normal sign that the body is building protection.
Side effects may include:
Pain at the injection site
Millions of people have safely received a COVID-19 vaccine.
It’s important to remember that all vaccines carry risks for side effects. These risks must be balanced with the benefits. COVID-19 is a serious illness — and anyone can develop life-threatening complications if they get it. Fortunately, scientists and health experts have confirmed that the benefits of the COVID-19 vaccines outweigh any risks for possible side effects.
Long-term side effects are unlikely.
Serious side effects that could cause a long-term health problem are extremely unlikely following any vaccination, including COVID-19 vaccination. Vaccine monitoring has historically shown that side effects generally happen within six weeks of receiving a vaccine. All COVID-19 vaccines have been studied for at least two months (eight weeks) after the final dose. Millions of people have received COVID-19 vaccines and no long-term side effects have been detected.
I take good care of my health. Can my body build natural protection without a vaccine?
Even if you are in good health, COVID-19 can have serious, life-threatening complications, and there is no way to know how COVID-19 will affect you. You could also spread COVID-19 to your family, friends, and others around you.
The good news is the vaccines are extremely effective in preventing severe illness and death. The risk of severe illness and death from COVID-19 far outweighs any benefits of natural immunity. COVID-19 vaccination will help protect you by creating an immune system response without having to experience sickness.
Did the clinical trials include people like me?
Researchers made sure that the trials included adults of diverse backgrounds, races, ethnicities, and geographic areas. They collaborated with faith leaders, community organizations, and health clinics to reach volunteers from many different walks of life across the United States.
Health experts and doctors want to make sure the vaccines work safely and effectively for as many people as possible. People may respond differently to vaccines based on factors like age, gender, and health conditions — so it is important to have a diverse group of participants in clinical trials.
Do vaccines affect fertility?
There is no evidence that any vaccines, including COVID-19 vaccines, cause fertility problems.
If you are trying to become pregnant now or want to get pregnant in the future, you can still get a COVID-19 vaccine. While fertility was not specifically studied in the clinical trials of the vaccine, no loss of fertility has been reported among trial participants or among the millions who have received any of the authorized vaccines.
Like with all vaccines, health experts are studying COVID-19 vaccines carefully for side effects and will report findings as they become available.
What if I’m pregnant or considering becoming pregnant?
We recommend that people who are pregnant or considering becoming pregnant get a COVID-19 vaccine. Clinical trials are underway to look at the safety and how well the COVID-19 vaccines work in pregnant people. To date, thousands of pregnant people have safely received the COVID-19 vaccine. Please talk with your health care provider if you have any additional concerns.
There are several benefits of vaccination for people who are pregnant or considering becoming pregnant:
Being pregnant increases the risk of getting COVID-19.
Being pregnant may also increase the risk of severe COVID-19 infection, especially among Latinx and Black people.
Pregnant people with COVID-19 are at increased risk of maternal and fetal complications such as preterm labor.
Getting vaccinated during pregnancy can protect your baby as well as you.
There is no cost to you to get a vaccine.
Vaccination providers may charge an administration fee - usually billed to your insurance - but you do not need to have insurance to get a vaccine.
Find a vaccine near you.
COVID-19 vaccines are free and available at a variety of locations in Contra Costa County. All people ages 12 and older can get a vaccine.
John Muir Health