COVID-19 Vaccine FAQ

Updated as of July 22, 2021

We know there are a lot of questions about the COVID-19 vaccines. Our goal is to keep you informed and answer your questions regarding the safety and misconceptions surrounding this topic. Below is a list of common questions about the COVID-19 vaccines based on current knowledge and understanding. These questions will continue to evolve with time, so we encourage you to check back frequently for the most up-to-date information.

Frequenlty Asked Questions about COVID-19 Vaccines​

1. Who is currently eligible for the COVID-19 vaccine?

Everyone 12 years of age and older is now eligible to get a COVID-19 vaccination. Get a COVID-19 vaccine as soon as you can and become a #VaccineHero. According to the CDC, widespread vaccination is a critical tool to help stop the pandemic.

2. Where can I get a COVID-19 vaccine?

COVID-19 vaccines are currently being offered locally at the following locations:

  • Gibson's Pharmacy 270.247.1055
  • Duncan's Prescription Center 270.247.3345
  • Stone's Health Mart Pharmacy 270.247.3232
  • Walmart Pharmacies
    • Mayfield 270.247.2280
    • Fulton 270.472.9802
    • Benton 270.527.3597
    • Paducah 270.444.0046
  • Kroger Pharmacies
    • Murray 270.759.1288
    • Paducah (Park Avenue location) 270.443.9459
  • Walgreens 270.247.2272
  • CVS 270.247.4073

3. The vaccine was produced very quickly. How do I know it is safe?

The U.S. vaccine safety system ensures that all vaccines are as safe as possible. Safety is the top priority while federal partners work to make the COVID-19 vaccines. Despite what the name may suggest, “Operation Warp Speed” does not mean that manufacturers were able to skip steps or cut corners in the vaccine development process. Instead, after development of the vaccine, manufacturers took a secured risk and overlapped the study, manufacturing and distribution phases. The FDA committed to giving these vaccinations priority (not rushed) review at all phases of the studies, which helped speed up the overall process. Ongoing monitoring of vaccine effectiveness and side effect reports will continue to be evaluated by the FDA and the manufacturers.

4. If I get the COVID-19 vaccine, should I still wear a mask?

If you’ve been fully vaccinated:

  • You can resume activities that you did prior to the pandemic.
  • You can resume activities without wearing a mask or staying 6 feet apart, except where required by federal, state, local, tribal, or territorial laws, rules, and regulations, including local business and workplace guidance.
  • If you travel in the United States, you do not need to get tested before or after travel or self-quarantine after travel.
  • You need to pay close attention to the situation at your international destination before traveling outside the United States.
    • You do NOT need to get tested before leaving the United States unless your destination requires it.
    • You still need to show a negative test result or documentation of recovery from COVID-19 before boarding an international flight to the United States.
    • You should still get tested 3-5 days after international travel.
    • You do NOT need to self-quarantine after arriving in the United States.
  • If you’ve been around someone who has COVID-19, you do not need to stay away from others or get tested unless you have symptoms.
    • However, if you live or work in a correctional or detention facility or a homeless shelter and are around someone who has COVID-19, you should still get tested, even if you don’t have symptoms.

Masks are required on planes, buses, trains, and other forms of public transportation traveling into, within, or out of the United States and in U.S. transportation hubs such as airports and stations. Travelers are not required to wear a mask in outdoor areas of a conveyance (like on a ferry or the top deck of a bus). CDC recommends that travelers who are not fully vaccinated continue to wear a mask and maintain physical distance when traveling.

5. If I have already had COVID-19 and recovered, should I still get the COVID-19 vaccine?

Yes, at this time the vaccine is recommended even if you previously tested positive for COVID-19. Due to the severe health risks associated with COVID-19 and the fact that re-infection with COVID-19 is possible, individuals who have previously been infected with COVID-19 should proceed with getting the vaccine.

6. Can you contract COVID-19 by getting the vaccine?

No. The vaccine is NOT a live vaccine, and it is NOT possible to contract COVID-19 from receiving the vaccine. Some people experience side effects from the vaccine, such as headache, muscle pain, or fever – but that does not mean you have COVID-19.  It means your body is working to build the necessary immunity against the virus, which is a good thing. 

7. What are the possible side effects/adverse events from the COVID-19 vaccine? 

The most common adverse reactions reported have been fatigue, headache, fever/chills and joint pain. This means your body is working to build the necessary immunity against the virus. You can read more in Pfizer’s FDA Briefing Document and Moderna’s FDA Briefing Document about the side effects reported among the vaccine study participants for these vaccines.

8. Can the COVID-19 vaccine be administered to children?

The COVID-19 vaccine is not indicated for children younger than 12 years old at this time.

9. Can the COVID-19 vaccine be administered to pregnant women?

The American College of Obstetricians and Gynecologists (ACOG) recommends that COVID-19 vaccines should not be withheld from pregnant individuals. It is important to note that the COVID-19 vaccines currently available have not been tested in pregnant women, so there is no safety data specific to use in pregnancy. Pregnant women should make an informed decision after discussing with their healthcare provider.

10. How many doses are required? If multiple, when do I get another dose?

The dose regimen for full vaccination will depend on the type of vaccine you receive. For both the Pfizer and Moderna vaccines, two doses are required. The second dose of the Pfizer vaccine should be administered 21 days after the first dose. The second dose of the Moderna vaccine should be administered 28 days after the first dose. It is very important to note that the second dose must be from the same manufacturer as the first dose. Other types of vaccines may only require one dose.

11. What should I do if I am unable to get the second dose exactly 21 days (Pfizer) or 28 days (Moderna) after the first dose?

While it is recommended that you receive the second dose as soon as feasible after day 21 or day 28, we understand that it might not be possible to receive it on the desired date. This could be due to multiple reasons. Please keep the following in mind if you cannot receive the second vaccine dose on the desired date:

  1. You must receive the second dose from the same manufacturer as the first dose.
  2. Get the second dose as soon as possible after the desired date has passed, as it is better to get the second dose late than not at all. You will still experience the same efficacy in the long run, although you may not see the full effect of the immunity until a few weeks after the second dose. 

12. How long after receiving my full dose regimen until it is considered effective?

Similar to the flu vaccine, it typically takes a few weeks for the body to build immunity 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 get sick. This is because the vaccine has not had enough time to provide protection. As a general rule, the vaccine is considered effective about two weeks after your full dose regimen, according to the manufacturers. If you are receiving the Pfizer or Moderna vaccines, which require two doses, there is evidence that the first dose will begin providing some immunity, but it is still very important to receive the second dose for optimal results.

13. Can I choose which vaccine I get?


We do not recommend waiting for a specific manufacturer. All authorized COVID-19 vaccines have been proven effective in reducing the risk of becoming infected with the SARS-CoV-2 virus that causes COVID-19, decreasing the likelihood of having a severe case of the illness and reducing hospitalizations and deaths due to COVID-19 disease. It is recommended that you receive the first vaccine made available to you. Early defense is better than no defense against COVID-19.

14. If receiving a two-dose regimen, should those who experience significant side effects from their first COVID-19 vaccine dose expect significant or worse side effects with the second dose? What about those who were previously COVID-19-positive?

Based on data from the Pfizer and Moderna vaccines, there appears to be an increased incidence of experiencing certain side effects from the second dose of the COVID-19 vaccine compared to the first dose (e.g., fever, fatigue, headache, chills, muscle pain, and joint pain). This does not mean that all vaccine recipients will experience these side effects with the first or second dose. A full list of the reported side effects comparing Dose 1 and Dose 2 may be found within the Pfizer BioNTech EUA Fact Sheet and the Moderna EUA Fact Sheet. At this time, we do not have definitive data to state whether vaccine side effects are worse in patients who were previously positive for COVID-19.

15. How long will I need to be observed after I get the vaccine?

In general, a 30-minute observation period is recommended for anyone with a history of severe allergic reactions (due to any cause), and a 15-minute observation period is recommended for all other individuals.

16. Will the COVID-19 vaccine result in a false positive COVID-19 test?

No, COVID-19 vaccination will not cause a false positive COVID-19 viral test. Per CDC guidance, the immunity response from a COVID-19 vaccine could possibly result in a positive antibody test, which indicates previous infection and potential protection against the virus.

17. If I become COVID-19-positive following my first dose of the vaccine, should I take the second dose?

Per CDC guidance, you may receive the vaccine (either dose) following resolution of symptoms, if any, and completion of the quarantine period.

18. What ingredients are included in the COVID-19 vaccines?

Ingredients for authorized COVID-19 vaccines can be found via this CDC link. Individuals with allergies to any of the vaccine components should discuss concerns with their healthcare provider before receiving the vaccine.

19. Does the virus protect against strands like the SARS-CoV-2 Delta variant?

Please, visit our Delta Variant FAQ page for all your Delta questions.