Flu and Covid-19 Vaccines: Should You Bundle Your Shots This Season?

It's that time of year again—flu season. We want to ensure that you and your loved ones stay safe during this period. Many blood cancer patients and caregivers may be asking themselves, "Should I get my flu vaccine and COVID booster at the same time, or should I space them out?" 

To address this question, we decided to investigate further. Remember, the right decision is the one made by you and your care team. This article's purpose is to inform you about recent research in this area.

Special Considerations for Blood Cancer Patients

Due to the biology of blood cancer, we know the ultimate priorities are to keep lab numbers controlled and within the proper range while maintaining a safe immune system. 

Let’s brush up a bit on why it is important to keep blood cancer patients’ immune systems safe.  Blood cancers disrupt plasma and other blood cells, which are extremely important for antibody protection, thus heightening the risk of infection.

Due to having a suppressed immune system, timely vaccinations are even more important. However, because of unique immune responses, blood cancer patients and their caregivers should carefully weigh the benefits and slight risks of co-administering the flu and COVID-19 vaccines.

Why Co-Administration May Be Beneficial

The Advisory Committee on Immunization Practices (ACIP) supports flu and COVID-19 co-administration as minor side effects were resolved quickly.

In fact, administering both vaccines together simplifies the process and reduces the need for multiple healthcare visits. Fewer trips mean less exposure, which is invaluable for immunocompromised patients. In addition, this method decreases the chances of forgetting or pushing the latter vaccination off. 

Eligibility Criteria for Co-administration in Blood Cancer Patients

If you are eligible to receive both flu and COVID-19 vaccinations during one visit, this combination could minimize environmental safety risks. Eligibility typically includes individuals in stable health with no recent fever, active infections, or history of severe allergic reactions to either vaccine.

However, those who recently had COVID-19 (within three months of a planned booster), are currently facing an infection or fever, or have a known allergy to vaccine components may need to separate their vaccinations for added safety. 

It's worth noting that while receiving both vaccines simultaneously is generally recommended, one should consider potential risks. Although early data indicates promising safety for co-administration, the side effects a patient might experience are worth discussing. 

Reactions to Co-administration

Reactions have been seen when the two vaccines are taken together but these side effects or reactions are not common. One recent study, Reactogenicity of Simultaneous COVID-19 mRNA Booster and Influenza Vaccination in the US, provides key insights into the side effects with co-administration. The findings reported an 8% (Pfizer-BioNTech) and 11% (Moderna) increase in systemic reactions such as fatigue, headache, and muscle aches. However, these reactions were typically mild and self-resolving. 

For patients who may be understandably cautious about potential side effects or reactions, it is possible to receive the vaccinations a week apart as a practical option to help reduce the likelihood of adverse effects. This approach allows for closer monitoring of each vaccine’s impact, reassuring those with specific health considerations.

With all of this in mind, if they desire, blood cancer patients should discuss co-administration of the vaccines with their healthcare team, as side effects like fatigue and soreness could temporarily affect quality of life post-vaccination, but the benefits could outweigh these risks.

Choosing the Flu Vaccine: Special Notes on Vaccine Adjuvants

Given the wide range of flu vaccine options now available, it's essential to make an informed choice and understand the different types and their unique components. New flu vaccines have been introduced, such as Fluad, which contain adjuvants (an element that increases immune response to antigens). As stated by the CDC, Fluad has been approved for those 65 years and older and or those who are receiving treatment that suppresses one’s immune system.

Though this technology is exciting, it is relatively new and should be discussed with your care team. They can be highly effective for older and immunocompromised patients, but if you are bundling the shots, it may be worth opting for adjuvant-free options. 

Choosing an appropriate flu vaccine with guidance from a healthcare provider is crucial to avoid overstimulating an already compromised immune system.

Next Steps

So, what's the verdict? Co-administration of the flu and COVID-19 vaccines is safe, and protecting yourself and your loved ones during this time of year is essential.

Personalized guidance from healthcare providers is critical in ensuring the right balance of protection and comfort. Whether vaccines are given together or spaced out, the key is consistent immunization to help reduce the risk of severe infections.

For more information on the coadministration of the flu and COVID-19 vaccines from the Center of Disease Control (CDC), refer to the following link: ​​Getting a Flu Vaccine and other Recommended Vaccines at the Same Time | Influenza (Flu) | CDC

Sources: 

• Reactogenicity of Simultaneous COVID-19 mRNA Booster and Influenza Vaccination in the US Infectious Diseases | JAMA Network Open

• Do Covid-19 Vaccines Trigger blood cancer?

• Getting a Flu Vaccine and other Recommended Vaccines at the Same Time | Influenza (Flu) | CDC