If you’re living with obesity, staying protected against COVID-19 continues to matter, especially as new variants circulate. The U.S. Food and Drug Administration (FDA) has approved a new set of COVID-19 vaccines for the 2025-2026 season, and the Centers for Disease Control and Prevention (CDC) has released updated vaccine guidance.

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Here’s what you should know about this year’s booster: how it works, who qualifies, and how to make a plan with your care team.

1. New Boosters Target the LP.8.1 Variant This Season

The COVID-19 vaccines are reformulated each year to better match the most commonly circulating virus strains. For the 2025-2026 season, the FDA directed vaccine manufacturers to update their formulas using a monovalent JN.1 lineage, specifically the LP.8.1 strain.

The FDA has approved 2025-2026 booster formulas for:

• Pfizer’s Comirnaty — A messenger RNA (mRNA) vaccine for people ages 5 to 64 with at least one health condition that increases the risk of severe COVID-19, and for all adults 65 and older
• Moderna’s Spikevax — An mRNA vaccine for people ages 6 months to 64 years with a high-risk health condition, and for all adults 65 and older
• Moderna mNexspike — A lower-dose mRNA vaccine for people ages 12 to 64 years with a high-risk health condition, and for all adults 65 and older
• Novavax’s Nuvaxovid — An adjuvanted, protein-based vaccine for people ages 12 to 64 with a high-risk health condition, and for all adults 65 and older

How Are the Boosters Different?

The main difference is how they’re made. Pfizer and Moderna use mRNA technology, which gives your cells instructions to make a harmless piece of the virus so your immune system learns to fight it. The Novavax vaccine is protein-based (a more traditional vaccine type). It delivers a purified piece of the virus protein with an adjuvant to boost your immune response.

For most people, any of the three options offers similar protection against severe illness. All are approved for high-risk groups, including people with obesity.

2. People With Obesity May Be at Higher Risk for Severe COVID-19

COVID-19 doesn’t just affect the lungs. It can trigger widespread inflammation and disrupt how the immune system works, potentially leading to complications throughout the body. For people living with obesity, the impact can be more serious.

People with obesity may be at higher risk for severe illness from COVID-19. Researchers have found that having a higher body mass index (BMI) may triple the risk of hospitalization from infection. The CDC also notes that obesity can weaken the immune system and make it harder for the lungs to expand, which can cause breathing problems during severe illness.

Additionally, conditions such as heart disease, type 2 diabetes, or lung disease are all known to increase the risk of severe COVID-19 complications, and they are more common among people with obesity than in the general population.

Can COVID-19 Be Cured?

While most people recover fully from a COVID-19 infection, some develop long COVID, a condition where symptoms persist or reappear weeks or even months after the initial infection. These may include fatigue, brain fog, shortness of breath, and joint pain.

There are treatments available for COVID-19, including antiviral medications like nirmatrelvir/ritonavir (Paxlovid), remdesivir (Veklury), and molnupiravir (Lagevrio). These treatments work best when started early, ideally within the first few days of symptoms.

Not everyone can take these medications. They may interact with other prescriptions or be unsafe for people with certain health conditions. Your doctor can help determine whether one of these treatments is right for you.

3. Health Experts Agree COVID-19 Vaccines Are Safe for People With Obesity

Health experts strongly recommend that people living with obesity stay up to date with COVID-19 vaccination to reduce the risk of hospitalization, severe disease, and death. The CDC emphasizes that vaccinations help keep adults and children from getting seriously sick, even if they do get COVID-19.

Health experts recommend that people with overweight or obesity:

• Get the COVID-19 vaccine when eligible and stay current — Updated doses provide the best protection, including against severe outcomes.
• Talk with your care team about your overall risk — Discuss other conditions (like heart disease or diabetes) and layered protections (such as masking during COVID-19 surges), especially if you’ve had severe COVID-19 before or have limited mobility.
• Know the vaccines are safe and not live — They do not contain the virus and cannot give you COVID-19.
• Understand you may still benefit even if antibody responses are lower — Some research shows that COVID-19 vaccines may not last as long in people with severe obesity compared with those at lower weights. Even if your antibody response is lower, vaccination still helps reduce the risk of severe illness — so staying up to date matters.

Separately, the CDC’s Advisory Committee on Immunization Practices (ACIP) has recommended that people decide whether to get a COVID-19 vaccination based on individual decision-making. This approach is similar to guidance around the annual flu shot: You and your doctor can work together to decide what’s right for you.

4. If You’re Living With Obesity, Timing Matters

If you’re considering the updated COVID-19 vaccine, here are important timing steps to talk through with your care team:

• Ask if you qualify based on your age and health history.
• Plan around your treatment cycles. Your doctor may recommend receiving the vaccine when your immune system is more stable.
• Check the timing of your last COVID-19 dose. The updated booster should be given at least two months after your most recent shot.

You can also add extra layers of protection by:

• Wearing a high-quality mask in crowded or poorly ventilated spaces
• Practicing frequent and thorough hand-washing
• Improving ventilation by opening windows or using air filters
• Testing right away if you have symptoms or believe you’ve been exposed

These added steps help lower your risk during treatment weeks or in high-risk situations.

5. Your Doctor Can Help Personalize Your Plan

Every person’s journey is different, and so is their COVID-19 risk. Your care team can help you figure out:

• When to get the updated vaccine
• How it fits into your treatment schedule
• What precautions make the most sense for your lifestyle and health goals

Bringing the FDA guidance with you to your next doctor visit can be helpful. It gives you and your provider a starting point to talk about timing, eligibility, and any questions you may have.

6. Most Insurance Plans Cover COVID-19 Boosters

If the CDC recommends a COVID-19 booster for you, most insurance plans, including Medicare, Medicaid, and private health insurance, will cover it at no cost. This includes the updated vaccines for the 2025-2026 season. Coverage generally applies as long as the shot is given by a provider in your insurance network.

That said, plan details can vary. Call your insurance provider or check your plan’s website to confirm coverage and avoid any surprises. If you don’t have medical insurance, free COVID-19 vaccines may still be available through public health clinics or federal programs.

Find Your Team

On MyObesityTeam, people share their experiences with obesity, get advice, and find support from others who understand.

What influenced your choice to get — or not get — the new COVID-19 booster? Let others know in the comments below.