• The Moderna COVID‑19 Vaccine has not been approved or licensed by the US Food and Drug Administration (FDA), but has been authorized for emergency use by FDA, under an Emergency Use Authorization (EUA), to prevent Coronavirus Disease 2019 (COVID‑19) for use in individuals 18 years of age and older. There is no FDA-approved vaccine to prevent COVID‑19.
  • The EUA for the Moderna COVID‑19 Vaccine is in effect for the duration of the COVID‑19 EUA declaration justifying emergency use of the product, unless the declaration is terminated or the authorization is revoked sooner.

Frequently Asked Questions

Explore these topics to find the answers to some of the most common questions we get from healthcare professionals.

Can’t find the answer to your question? Give us a call at 1-866-MODERNA (1‑866‑663‑3762).


Who is Moderna?

Moderna, Inc. is a biotechnology company developing messenger RNA (mRNA) therapeutics and vaccines to investigate and potentially create a new class of medicines for patients. Moderna was established in 2010 and is headquartered in Cambridge, Massachusetts.

If you would like more information on Moderna, you can visit our website.

Does Moderna have any other approved products on the market?

Moderna currently does not have any United States Food and Drug Administration‑approved products.

Moderna has been investigating messenger RNA (mRNA) therapeutics and vaccines since its founding in 2010 and has more than 20 products in active preclinical and clinical development.

If you would like more information on the products under development at Moderna, visit https://www.modernatx.com/pipeline.

What does it mean that the vaccine is based on mRNA technology?

A vaccine based on messenger RNA (mRNA) technology, such as Moderna COVID‑19 Vaccine, does not use inactivated virus, attenuated virus, or any other kind of virus.

The Moderna COVID‑19 Vaccine uses mRNA to provide a blueprint for your cells to build your body’s defense against the virus.

This allows the body to generate an antibody response, and to retain the information in memory immune cells, in order to attack the virus if the vaccinated individual is exposed to the virus.

I have more questions. Where can I learn more?

If you have more questions, you may wish to reach out to your state, territorial, tribal, or local health department, especially with questions about vaccine availability.

You can also find more information online at the following websites:

The following resources include additional educational material for vaccination providers:

Supply & Availability

How do I order Moderna COVID-19 Vaccine?

Moderna has been contracted by the United States Government to provide Moderna COVID‑19 Vaccine under the EUA. The federal government is establishing recommendations and requirements, and final distribution will be managed by state, territorial, tribal or local health departments.

For details on vaccine distribution, including where and how much vaccine is supplied, and who is eligible for vaccination, you should contact your state, territorial, tribal or local health department.

More information on providing COVID‑19 vaccination at your practice is available from the US Centers for Disease Control and Prevention.

The EUA for Moderna COVID‑19 Vaccine is in effect for the duration of the COVID‑19 declaration justifying emergency use of this product, unless terminated or revoked, after which the product may no longer be used.

Where can I get vaccination supplies, such as syringes?

Ancillary supplies including syringes, needles, and Personal Protective Equipment to support COVID‑19 vaccinations, are being supplied by the US Government. More information on the availability, how to order and return these ancillary supplies should be available from your state, territorial, tribal or local health departments.

The supplies needed for administration of Moderna COVID-19 Vaccine are normal and typical vaccine supplies that are available from medical supply companies, such as a syringe with a needle greater than 1 inch for intramuscular adminstration.

Vaccine Reimbursement

How will I be reimbursed for administering the Moderna COVID-19 Vaccine?

According to the US Centers for Disease Control and Prevention, or CDC for short, vaccine doses purchased with US taxpayer dollars will be given to the American people at no cost. However, vaccination providers will be able to charge an administration fee for giving the shot to someone. Vaccine providers can get this fee reimbursed by the patient’s public or private insurance company or, for uninsured patients, by the Health Resources and Services Administration’s Provider Relief Fund.

Download a quick-reference guide for billing administration of the Moderna COVID-19 Vaccine, including CPT Codes.

Product & Production

Where is the vaccine used in the US manufactured?

Moderna COVID-19 Vaccine is being produced by Moderna and by manufacturing partners, including Lonza and Catalent, at facilities located in the United States.

Get more information on Moderna's technology and manufacturing capability and partnerships at Moderna's website.

Are there other vaccines for COVID‑19?

Currently, there are no FDA‑approved vaccines available for prevention of COVID‑19. In addition to Moderna COVID‑19 Vaccine, other vaccines to prevent COVID‑19 may be available under Emergency Use Authorization. No comparative trials of vaccines have been conducted.

What side effects are seen with this vaccine?

In clinical studies, the adverse reactions in participants 18 years of age and older were pain at the injection site (92.0%), fatigue (70.0%), headache (64.7%), myalgia (61.5%), arthralgia (46.4%), chills (45.4%), nausea/vomiting (23.0%), axillary swelling/tenderness (19.8%), fever (15.5%), swelling at the injection site (14.7%), and erythema at the injection site (10.0%).

Additional adverse reactions, some of which may be serious, may become apparent with more widespread use of the Moderna COVID‑19 Vaccine.

The vaccine was incorrectly handled. Can it still be used?

Moderna COVID‑19 Vaccine should be stored and handled under the freezer and refrigerator conditions as described in the Fact Sheet for Healthcare Providers Administering Vaccine (Vaccination Providers) and Full EUA Prescribing Information.

Vials can be stored refrigerated between 2° to 8°C (36° to 46°F) for up to 30 days prior to first use.

Unpunctured vials may be stored between 8° to 25°C (46° to 77°F) for up to 12 hours.

After the first dose has been withdrawn, the vial should be held between 2° to 25°C (36° to 77°F). Discard vial after 6 hours. Do not refreeze.

If for any reasons, some vials may have experienced a temperature excursion, use our Temperature Excursion Tool for further instructions.

For more information, please contact Moderna at 1‑866‑MODERNA (1‑866‑663‑3762).

How do I know if the vaccine is expired?

Shipped packages and vials do not include expiration dates. Each carton and each vial includes a QR code. Scanning the QR code with a smartphone will bring you to an online resource that allows you to find the expiration date for any vial, based on its lot number. The lot number is printed on the packaging.

You can access the lot number expiration look-up here.

How do I know that the vaccine I received is not counterfeit?

Moderna is committed to safety and ensuring that people have accurate information about the investigational Moderna COVID‑19 Vaccine, including how it is accessed and administered.

Moderna is actively monitoring for fraudulent offers of illegitimate Moderna COVID‑19 Vaccine to protect individuals from products that might be dangerous and lead to serious and life-threatening harm. Keep in mind that under the EUA issued by FDA:

  • The Moderna COVID‑19 Vaccine is only administered as an intramuscular injection by a healthcare professional.
  • The Moderna COVID‑19 Vaccine is not taken orally and is not available as a capsule, tablet, or any other formulation.
  • Authentic Moderna COVID‑19 Vaccine, manufactured by Moderna, will include the Moderna name and logo on the label and is dispensed in a vial with a red cap.

The Moderna COVID-19 Vaccine is not sold online.

The authenticity of products acquired outside of the legitimate supply chain cannot be verified by Moderna. If you suspect the Moderna COVID-19 Vaccine you have purchased may be counterfeit, please call Moderna Medical Information at 1‑866‑MODERNA (1‑866‑663‑3762).

I don't have a way to scan the QR code. What should I do?

If you do not have a device that can scan the QR code, you can instead find expiration dates for Moderna COVID-19 Vaccine vials using this expiration date look-up tool. Simply enter the lot number, from the vial or carton, and find the expiration date.

The vaccine appears to be defective or damaged. What can I do?

If you have defective or damaged vaccine, please contact Moderna Medical Information at 1‑866‑MODERNA (1‑866‑663‑3762).

Moderna COVID‑19 Vaccine is a white to off-white suspension. It may contain white or translucent product-related particulates.

Inspect Moderna COVID‑19 Vaccine vials visually for foreign particulate matter and/or discoloration prior to administration. If either of these conditions exists, the vaccine should not be administered.

Packages and vials that have not been stored and handled with the appropriate freezer and refrigeration requirements as outlined in the Fact Sheet for Healthcare Providers Administering Vaccine (Vaccination Providers) and Full EUA Prescribing Information should be discarded.

Vaccine Use in Special Populations

What is known about the safety of the vaccine for special populations (children, pregnant women, elderly people)?

Children: Safety and effectiveness have not been assessed in persons less than 18 years of age. Emergency Use Authorization of Moderna COVID-19 Vaccine does not include use in individuals younger than 18 years of age.

Pregnant women: Available data on Moderna COVID‑19 Vaccine administered to pregnant women are insufficient to inform vaccine-associated risks in pregnancy. There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to Moderna COVID‑19 Vaccine during pregnancy. Women who are vaccinated with Moderna COVID‑19 Vaccine during pregnancy are encouraged to enroll in the registry by calling 1‑866‑MODERNA (1‑866‑663‑3762).

Breastfeeding women: Data are not available to assess the effects of Moderna COVID‑19 Vaccine on the breastfed infant or on milk production/excretion.

Elderly people: Clinical studies of Moderna COVID‑19 Vaccine included participants 65 years of age and older receiving vaccine or placebo, and their data contribute to the overall assessment of safety and efficacy. In an ongoing Phase 3 clinical study, 24.8% (n=7,520) of participants were 65 years of age and older and 4.6% (n=1,399) of participants were 75 years of age and older. Vaccine efficacy in participants 65 years of age and older was 86.4% (95% CI 61.4, 95.2) compared to 95.6% (95% CI 90.6, 97.9) in participants 18 to <65 years of age. Overall, there were no notable differences in the safety profiles observed in participants 65 years of age and older and younger participants.

What should I do if a patient only receives one dose?

Moderna COVID‑19 was designed and studied to be given as a series of two doses 1 month apart. There are no available data on a single dose.

All effort should be made to ensure that all vaccine recipients receive 2 doses. Provide a COVID‑19 vaccination card to recipients as documentation of the first dose of Moderna COVID‑19 Vaccine and to remind them when a second dose should be administered.

How do I report adverse events from vaccination?

The vaccination provider enrolled in the federal COVID‑19 Vaccination Program is responsible for the MANDATORY reporting of the listed events following Moderna COVID‑19 Vaccine to the Vaccine Adverse Event Reporting System (VAERS)

  • Vaccine administration errors whether or not associated with an adverse event
  • Serious adverse events* (irrespective of attribution to vaccination)
  • Cases of multisystem inflammatory syndrome (MIS) in adults
  • Cases of COVID-19 that results in hospitalization or death

*Serious Adverse Events are defined as:

  • Death;
  • A life-threatening adverse event;
  • Inpatient hospitalization or prolongation of existing hospitalization;
  • A persistent or significant incapacity or substantial disruption of the ability to conduct normal life functions;
  • A congenital anomaly/birth defect;
  • An important medical event that based on appropriate medical judgement may jeopardize the individual and may require medical or surgical intervention to prevent one of the outcomes listed above.

The vaccination provider enrolled in the federal COVID‑19 Vaccination Program should complete and submit a VAERS form to FDA using one of the following methods:

To the extent feasible, report adverse events to ModernaTX, Inc. using the contact information below or by providing a copy of the VAERS form to ModernaTX, Inc.

Email: Fax: 1‑866‑599‑1342 Phone: 1‑866‑MODERNA (1‑866‑663‑3762)

Is mask wearing and social distancing necessary after the first dose? After the second dose?

Everyone, including persons who have received both doses of vaccine, should continue to follow CDC's recommendations on wearing masks, washing hands, and social distancing.

Are there any risks with concomitant vaccines?

There are no data to assess the concomitant administration of the Moderna COVID‑19 Vaccine with other vaccines.

Are there any known contraindications?

Do not administer the Moderna COVID‑19 Vaccine to individuals with a known history of severe allergic reaction (e.g., anaphylaxis) to any component of the Moderna COVID‑19 Vaccine.