Note: Information about the COVID-19 vaccine is changing rapidly. As we learn more, we will update the following Frequently Asked Questions with new information.

Special notice: Memorial Hermann has been selected by the State of Texas to serve as a vaccine hub. For additional information click here or email questions to or call (833) 772-2864.



Vaccines Administered*


Patients Vaccinated*


Patients Vaccinated with Both Doses*

*By Memorial Hermann Health System as of end of day 4/12/2021

COVID-19 Vaccine Guidance

As hospitals and doctor’s offices work diligently to vaccinate our community as quickly as possible, we encourage everyone to:

  • Be patient. Know that vaccines are only available in limited quantities and it will likely take several months to vaccinate all those who want the COVID-19 vaccine.
  • Check the website. Memorial Hermann's website is the best source of accurate, up-to-date information related to our COVID-19 vaccine distribution process. By limiting calls and unscheduled visits to our hospitals and doctor’s offices that are related to vaccine inquiries, we can more effectively assist and provide care for our patients and their loved ones.
  • Register for Vaccination. As a state-designated COVID-19 vaccine distribution hub, Memorial Hermann invites all members of the community 16 years of age and older to register for the opportunity to receive the COVID-19 vaccine at a Memorial Hermann vaccination clinic.

    Registered individuals will be notified when appointments are available. Memorial Hermann will make appointments available based on vaccine supply and will prioritize vaccine distribution in accordance with guidance from the Texas Department of State Health Services. Due to the limited supply of vaccine, it may be an extended period of time before you have the opportunity to get vaccinated at Memorial Hermann. If you have the opportunity to receive vaccination elsewhere in the meantime, we encourage you to do so. Register Now »

About Vaccines

Vaccines train the body’s immune system to recognize and fight viruses and bacteria. When the body is exposed again to a virus after being vaccinated against it, the body is immediately ready to fight the illness. Vaccines currently save millions of lives every year by preventing diseases like diphtheria, tetanus, pertussis, measles and influenza.

Getting a vaccine approved by the Food and Drug Administration (FDA) is a rigorous one, to ensure both safety and efficacy. Read more about the FDA’s approval process.

During a public health emergency, the FDA can issue an EUA to allow the use of unapproved medical products (or unapproved uses of approved medical products) to diagnose, treat or prevent serious or life-threatening diseases. Certain safety, efficacy and other criteria must be met.

A virus can spread very quickly throughout a community infecting many people. However, if enough people get vaccinated, germs cannot spread from person to person as quickly and the vast majority of people will not get sick. This is what is known as herd immunity. Herd immunity protects everyone, especially those people who cannot receive a vaccine for one reason or another, those who do not have a strong immune response to vaccines, and those with serious allergies or weakened immune systems.

About COVID-19 Vaccines

Vaccines developed by Pfizer, Moderna and Johnson & Johnson have been granted Emergency Use Authorization (EUA) by the FDA and are being distributed across the United States.

Although three vaccines are available in the United States at this time, more are in development. To learn about ongoing trials and new developments, visit the Coronavirus Prevention Network website. The network was formed by the National Institute of Allergy and Infectious Diseases (NIAID) at the U.S. National Institutes of Health.

Each vaccine will undergo the same stringent FDA review process before it receives approval or EUA, which means the FDA has determined there is substantial evidence that the vaccine is safe and effective in preventing a COVID-19 infection.

Before any vaccine is widely distributed to the public, it is tested in clinical trials on tens of thousands of people to determine its safety and efficacy. While development and authorization of the COVID-19 vaccines were accelerated, this does not mean that safety corners were cut; the Pfizer, Moderna and Johnson & Johnson vaccines went through the same stringent testing process that other vaccines go through before public dissemination.

Medical experts consider the Pfizer, Moderna and Johnson & Johnson vaccines safe and highly effective in protecting you from COVID-19, and they strongly encourage everyone to get their vaccine when it is their turn, regardless of the manufacturer.

It is a common misconception that vaccines prevent someone from contracting the virus. Vaccines train the body’s immune system to recognize and fight viruses and bacteria. When the body is exposed to a virus after being vaccinated against it, the body is immediately ready to fight the illness. Because the body is able to respond more quickly, you are less likely to experience symptoms of the illness, especially severe and life-threatening ones. Based on clinical trials and observations following the administration of more than hundreds of millions of doses, we know the COVID-19 vaccines are extremely effective in preventing severe illness and death from the virus.

At this time, there is not enough data about the vaccines to know how long they will provide protection from COVID-19.

Yes. We all need to continue the 3 W’s – wearing a mask, watching your distance and washing your hands regularly – until we know how long the vaccine protects against the virus and we gain community control of COVID-19.

No. None of the vaccines currently available use a live version of the virus, so a person who receives any of these vaccines cannot contract COVID-19 from the vaccination.

Side effects may vary depending on which vaccine you receive, but common side effects include fatigue, headache, muscle and joint pain, swollen lymph nodes and pain at the injection site, which is generally the upper arm. Before you receive your vaccine, specific information about your vaccine’s anticipated side effects will be provided to you.

This will depend on the vaccine. Both the Pfizer and Moderna vaccines require two doses to ensure full protection – an initial vaccination and a booster shot of the same brand of vaccine three or four weeks later, depending on the vaccine (Pfizer is 21 days later, while Moderna is 28 days later). The Johnson & Johnson vaccine requires only one dose for protection.

Effective March 29, 2021, the State of Texas is making the COVID-19 vaccine available to all adults. Individuals must be 16 years of age or older to receive the Pfizer vaccine and 18 years of age or older to receive the Moderna or Johnson & Johnson vaccine.

Additional information about the vaccines can be found in the FDA's fact sheets for the Pfizer vaccine, Moderna vaccine and Johnson & Johnson vaccine. You may find general information about the COVID-19 vaccine on the FDA’s website.

Getting Vaccinated At Memorial Hermann

Yes, individuals who receive an invitation to schedule vaccination can select a location for their appointment based on the vaccine being administered at that clinic.

In accordance with guidance from the State, all adults are eligible for COVID-19 vaccination at Memorial Hermann. We encourage members of the community to complete Memorial Hermann’s COVID-19 Vaccination Request Form to register for vaccination.

The invitation you received cannot be used by another individual. We encourage your loved ones to register for vaccination by completing Memorial Hermann’s COVID-19 Vaccination Request Form. They will be notified when appointments are available for them.

Memorial Hermann is actively working to expand our capacity and open additional appointments as we receive additional allocation of the COVID-19 vaccine. If you were invited to schedule a vaccination appointment but were unable to find available appointments, another invitation will be sent to you.

When you scheduled your vaccination, you should have received an automated confirmation text message from (281) 214-6637 or email from If you cannot find your confirmation, please call Memorial Hermann’s COVID-19 Vaccine Helpline at (833) 772-2864.

We strongly encourage you to keep your current appointment date and time. However, we understand circumstances can change. If you need to reschedule your appointment, locate the appointment confirmation that was sent to you via email from and click on “Cancel My Appointment.” You will be able to reschedule after your initial appointment has been cancelled.

You do not need to take action to make sure your vaccination is registered. Memorial Hermann will report all vaccinations to ImmTrac2, the statewide immunization registry. That record will contain the details of your vaccination – the brand of vaccine you received, for instance, and when you receive the second dose – and it can be accessed later by medical professionals.

If you received your COVID-19 vaccination through Memorial Hermann, you may obtain a copy of your COVID-19 vaccination record through Memorial Hermann’s patient portal, Everyday Well. This online account is accessible via the web or an app on your phone. To sign up, click here and then follow the step-by-step directions listed on the page. Once logged in, you can access your medical records, including proof of COVID-19 vaccination. COVID-19 vaccination records can be located by clicking on the “Health Information” tab, then selecting “Health Summary,” and then scrolling down to the “Immunizations” section. Please note that it may take up to seven days for your COVID-19 vaccination record to appear in the “Immunizations” section of your Everyday Well patient portal.

If you need help creating your Everyday Well account, please call (713) 222-CARE (2273).

If you are unable to access your vaccination records through Everyday Well, you may also request them through the Memorial Hermann Release of Information Department. Click here for more information.