Facts about the vax

Get answers to your questions about the COVID-19 vaccine by clicking on the questions below.

All vaccines train your body’s immune system to recognize and fight the virus if you are exposed.

The Moderna and Pfizer vaccines use mRNA technology. mRNA technology has been studied and developed for decades.

COVID-19 vaccine development followed the same safety guidelines as other vaccines we normally get. Tens of thousands of people participated in clinical trials for the vaccines. Adults of all ages and races were included. People with diabetes, asthma, heart disease and other health conditions were included. The testing found the vaccines to be safe among all groups included in the trials. Now, millions of people have safely received the vaccine since the trials ended.

The first one you can get! The sooner you can get protection from a vaccine, the better. All of the available COVID-19 vaccines have been shown to be safe and effective.



Yes! There is no evidence that the vaccine causes any problem with pregnancy. The risk of getting sick with COVID-19 during pregnancy can be serious. Experts recommend pregnant women get the vaccine to protect themselves and their babies.

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The vaccine does not protect you immediately. It takes up to 14 days after getting the second vaccine of Moderna and Pfizer for your body to build up full immunity. For the Johnson & Johnson vaccine, your body needs 28 days to build up full immunity. This is why it is important to still wear masks, stay physically distanced, and wash your hands until enough people are vaccinated.

How long does the vaccine take to work? Immunity needs a few weeks to build up. A 2nd dose, 3 to 4 weeks after the 1st (depending on which vaccine you get) is needed for full protection.

We don’t have an answer to this yet. There are many issues that make it hard to know right now.

The virus is changing over time. There are different strains of the virus called variants. Scientists are finding variants in countries like Brazil, South Africa, the United States, and the UK.

Some of the changes to the virus do not pose a threat. Others are more worrying. Some of the variants make it easier for the virus to move from person to person. Others can cause more serious health risks.

These changes to the virus are happening quickly and in many places. Because of this, scientists don’t know yet if current vaccines will provide you full protection against these variants.

These variants are another good reason for you and others to get vaccinated as soon as possible. They will protect you now and may provide some protection against the variants. It is also why it is important to still wear masks, stay physically distanced, and wash your hands.

If you and others around you get the vaccines, it will also help reduce the spread of COVID-19 in your community. It means you will have less risk of exposure to someone with the virus. And with less of the virus in your community, it will also help reduce the possibility of new variants. 

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There is no evidence that any vaccines affect fertility. This includes COVID-19 vaccines. 

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COVID-19 is a new disease. That means the vaccines are also new.  Vaccinations were only started in March of last year. So scientists don’t know how long they will last.

So far the news is very good. The vaccines provided last March to those in the clinical trials are still effective.

We don’t know how long the current vaccines will protect you after you get vaccinated. It is possible you will need a booster vaccine shot later to extend the protection. Scientists are studying how long protection from the vaccines lasts. They are also studying whether we will need booster shots for new variants.

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Scientists were able to develop COVID-19 vaccines in record time for three reasons: people, funding and research.

1. COVID-19 is a problem for people across the globe. Every country made it  their topmost priority to end the COVID-19 pandemic.
2. A lot of money and resources were put into developing COVID-19 vaccinations because it was an emergency.
3. Decades of research have already been done on vaccine technology for other diseases. These include diseases similar to COVID-19.  Scientists all across the world were focused on using existing knowledge to speed up the COVID-19 vaccine development.

Though COVID-19 vaccines were developed quickly, their safety and efficacy was ensured. This was possible because the clinical trials for COVID-19 vaccines had more people in them than any other vaccine that has been developed. The trials confirmed their safety and effectiveness.

Vaccines rarely cause long-term side effects. Any side effects generally happen within several weeks after getting a vaccine. For this reason, the FDA required each of the three COVID-19 vaccines to be studied for at least eight weeks after the final dose. Millions of people have received COVID-19 vaccines, and they have an excellent safety record. The CDC is closely monitoring the safety of COVID-19 vaccines.

It’s understandable to worry about side effects. But it’s important to know that serious side effects from vaccines are very rare. On the other hand, COVID-19 is known to cause serious illness in many people with lasting damage and even death. The benefits of the vaccine exceed the potential risks.

Out of extra caution, the U.S. has temporarily paused its use. In six people, rare blood clots developed after vaccination. This is being investigated. The pause is a reassuring sign that the systems put in place to keep us safe are working.

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The Pfizer vaccine is now approved for use in children ages 12 and up. The Moderna and Johnson & Johnson vaccines are approved for use in adults age 18 and up.

Clinical trials are testing vaccines in children younger than 12. Until vaccines are approved for use in children of all ages it is important to continue to wear masks, avoid large gatherings and crowds, and wash our hands.

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