Can You Get Vaccines While on Prednisone?

Most vaccines can be given while you are taking prednisone, but live vaccines are a notable exception when doses are high enough to suppress your immune system. The distinction between live and inactivated vaccines is the core of the issue, and the dose and duration of your prednisone course matter more than many people realize. Research over the past three decades has shown that inactivated vaccines remain both safe and reasonably effective for people on corticosteroids, while the picture for live vaccines is more cautious and more complicated.

Why the Type of Vaccine Changes Everything

Vaccines fall into two broad camps that matter here. Inactivated vaccines use killed viruses, pieces of a virus, or lab-made proteins to teach your immune system what to look for. These include flu shots, the pneumococcal vaccine, tetanus and diphtheria boosters, hepatitis B, and the newer mRNA and protein-based COVID-19 vaccines. Because there is no live pathogen in these shots, they cannot cause infection even if your immune system is weakened.

Live vaccines, on the other hand, contain a weakened but still replicating form of the virus or bacterium. Examples include the MMR vaccine (measles, mumps, rubella), the chickenpox (varicella) vaccine, the live nasal-spray flu vaccine, yellow fever vaccine, and the older oral polio vaccine. In a person with a healthy immune system, the weakened microorganism triggers a strong immune response without causing disease. But if prednisone has dialed down your immune defenses, that weakened pathogen could replicate in ways your body cannot control, potentially leading to the very illness the vaccine is meant to prevent. For this reason, live vaccines are generally contraindicated for people on immunosuppressive therapy.¹

Inactivated vaccines, by contrast, can be given without stopping your prednisone. Guidelines from both adult and pediatric rheumatology groups consistently affirm that non-live vaccines can be safely administered to immunosuppressed patients.² The trade-off is not safety but effectiveness: prednisone can blunt the immune response to any vaccine, meaning you might build fewer antibodies than someone who is not on the drug.

How Much Prednisone Is Too Much

Not every prednisone prescription carries the same immunological weight. A short five-day burst for an asthma flare is very different from months of high-dose therapy for lupus nephritis. General clinical guidance treats a daily dose of 20 mg or more of prednisone (or its equivalent), taken for two weeks or longer, as the threshold at which immune suppression becomes significant enough to worry about live vaccines. Below that level, or for shorter courses, the immune suppression is usually mild enough that even live vaccines are considered acceptable by many guidelines.

Pediatric recommendations from EULAR and PRES reinforce this graded approach. Their 2021 update states that national immunization schedules should be followed and assessed yearly by the treating specialist, and that non-live vaccines can be safely given to immunosuppressed children. They specifically note that seroprotection is generally preserved during immunosuppression, except with high-dose glucocorticoids and B-cell depleting therapies.³ The phrase “high-dose glucocorticoids” is doing important work there. Moderate doses may reduce your antibody response somewhat, but they do not usually erase it.

Short Steroid Bursts Barely Move the Needle

If your doctor prescribed a brief prednisone taper for an asthma attack, poison ivy, or a sinus infection, the evidence is reassuring. A study of children vaccinated against influenza during acute asthma exacerbations found that antibody responses to two of the three influenza strains were no different between children on prednisone and those who were not. For the third strain (influenza B), the prednisone group actually responded better. Adverse effects, including asthma flares, local swelling, fever, and headache, were also no different between the two groups.⁴

A separate study looking at asthmatic children on prednisone found a similar pattern. Roughly four out of five children in both the prednisone and control groups achieved a protective antibody rise after influenza vaccination, and the proportions reaching protective antibody levels were statistically indistinguishable between groups for all three vaccine antigens.⁵ These findings are consistent with what clinicians have observed for years: a brief course of prednisone does not meaningfully undermine the immune response to an inactivated vaccine.

What Happens With Longer Courses and Higher Doses

The picture changes once prednisone use stretches beyond a short burst. A study examining mRNA COVID-19 vaccines in people with chronic inflammatory diseases found that glucocorticoid use was associated with a roughly ten-fold reduction in both anti-spike IgG antibodies and neutralizing antibody levels compared to healthy controls. Perhaps more telling, the proportion of people who became seropositive after vaccination dropped from about 98% in immunocompetent controls to 92% in patients with chronic inflammatory diseases who were off prednisone, and down to 65% in those who were on prednisone at the time of vaccination.⁶

That 65% figure stands out. It means about a third of people on prednisone did not develop detectable antibodies after an mRNA COVID-19 vaccine, at least at the time they were tested. The vaccine was still safe, and some degree of cellular immunity likely still developed, but the humoral immune response was clearly weakened. This is the strongest evidence that prolonged glucocorticoid use can meaningfully blunt vaccine effectiveness, and it is the reason many specialists recommend booster doses or careful timing for people on ongoing corticosteroid therapy.

Inhaled and Injected Steroids Are a Different Story

A common source of confusion is whether inhaled steroids for asthma or COPD, or steroid injections into a joint or around a nerve, carry the same risks as oral prednisone. The short answer is that they do not. A multisociety position statement on corticosteroid injections and vaccine administration concluded that oral or inhaled steroids do not affect antibody titers after influenza vaccination.⁷

Inhaled corticosteroids work locally in the airways and are absorbed into the bloodstream in only tiny amounts. Similarly, a single cortisone injection into a knee or shoulder delivers the drug to a specific site. While a small amount enters systemic circulation, the doses involved are far below the threshold that would suppress your immune system in any meaningful way. If you are only using inhaled steroids or have had a localized injection, there is no reason to delay or skip any vaccine.

Inactivated Vaccines in Adults on Corticosteroids

Beyond the influenza and COVID-19 data, evidence from other inactivated vaccines paints a broadly encouraging picture. A study of patients with rheumatoid arthritis receiving the pneumococcal polysaccharide vaccine found that prednisolone treatment did not influence antibody responses. The drugs that did blunt responses in that study were methotrexate and TNF blockers, not the corticosteroid itself.⁸

Research on pulmonary patients receiving corticosteroids echoes this. About 84% of steroid-treated patients achieved at least a fourfold rise in antibody titer to one or more influenza vaccine components, compared to 79% of patients not on corticosteroids. The authors specifically noted there was no corticosteroid dose-response relationship for the influenza vaccine response.⁹ This aligns with the general clinical impression that moderate corticosteroid doses leave enough immune capacity intact for inactivated vaccines to do their job.

There is even evidence that people on oral corticosteroids who have developed low immunoglobulin levels can still mount adequate vaccine responses. Research on children with steroid-dependent asthma and measurable hypogammaglobinemia showed they maintained adequate antibody responses to both protein-based and polysaccharide-based vaccines, suggesting that humoral immune function persists at a functional level even when total antibody counts look worrying on paper.

When You’re on Prednisone Plus Other Immunosuppressants

Many people taking prednisone for autoimmune conditions are also on other immunosuppressive drugs like methotrexate, azathioprine, mycophenolate, or biologic agents such as rituximab. This combination is where vaccine effectiveness takes its biggest hit, and it is important to understand that the culprit is often the other drug, not the prednisone.

In the rheumatoid arthritis pneumococcal vaccine study mentioned earlier, prednisolone alone did not impair responses, but methotrexate and TNF blockers did.¹⁰ Rituximab, which depletes the B cells responsible for making antibodies, is particularly devastating to vaccine responses. If you are on a combination regimen, the strategy for vaccine timing often revolves around the other drug’s schedule rather than the prednisone itself.

The EULAR/PRES pediatric recommendations specifically call out B-cell depleting therapies alongside high-dose glucocorticoids as the two scenarios where seroprotection after vaccination is most commonly lost.³ For most other combinations, vaccines remain worth getting because partial protection is better than none, even if the antibody response is blunted.

Timing Vaccines Around Your Prednisone Course

The ideal scenario, when it is feasible, is to get vaccinated before starting immunosuppressive therapy. Guidelines for patients with immune-mediated diseases recommend administering vaccines before treatment whenever possible, though they also stress that necessary treatment should never be postponed just to accommodate a vaccination schedule.² In practice, this means if you know you are about to start a long course of prednisone or a stronger immunosuppressant, it is worth checking whether any vaccines are due and getting them beforehand.

If you are already on prednisone, the timing calculus depends on whether you are tapering off. For live vaccines, the standard recommendation is to wait at least one month after stopping high-dose prednisone before receiving a live vaccine. For inactivated vaccines, there is no need to wait. You can receive them at any point during treatment, understanding that the immune response might be somewhat weaker at higher doses.

An interesting wrinkle emerged from COVID-19 vaccine research. One review noted that vaccine efficacy was maintained in patients on continuous steroids or steroids started after vaccination, but not in patients who stopped steroids prior to vaccination.¹¹ This counterintuitive finding suggests that abruptly stopping steroids before a vaccine may not help and could even disrupt the immune response. The lesson is not to self-adjust your prednisone dose around a vaccination without talking to your doctor.

Should You Worry About Side Effects

One unexpected finding from the COVID-19 vaccine era is that short-term corticosteroid use around the time of vaccination may actually reduce side effects without harming the immune response. A study of healthcare workers who received a short course of prednisolone after the first dose of the AstraZeneca COVID-19 vaccine experienced significantly milder overall reactions compared to those who did not take prednisolone. Despite the reduced side effects, the prednisolone group showed antibody levels that were not significantly different from the untreated group, and their cellular immune response, measured by interferon-gamma production, was actually the strongest of any group in the study.¹²

This does not mean you should take prednisone to avoid vaccine side effects. But it does suggest that people who happen to be on a short steroid course at the time of vaccination should not expect worse outcomes from the vaccine itself. The common fear that “the vaccine won’t work if I’m on steroids” is much more nuanced than that blanket worry implies.

The Risk of Stopping Treatment for a Vaccine

People with autoimmune diseases sometimes face advice, formal or informal, to pause their medications around vaccination. While this might seem logical as a way to let the immune system respond more fully, it comes with its own risks. Stopping immunosuppressive treatment can trigger a disease flare, and the evidence that doing so actually improves vaccine response is mixed at best.

A review of disease flares after COVID-19 vaccination in people with rheumatic diseases found a marginal association between stopping treatment for the vaccine and experiencing a flare. One cited dataset showed that patients who discontinued treatment had a higher observed rate of flares, though the difference was not statistically significant in all studies.¹³ The risk-benefit calculation is individual. For someone on a low to moderate dose of prednisone, stopping the drug for a vaccine offers a marginal and uncertain immunological benefit while introducing a real chance of their underlying condition flaring up. Most rheumatologists and immunologists advise against pausing prednisone for inactivated vaccines.

Vaccines That Deserve Extra Attention

A few specific vaccines come up frequently in conversations about prednisone. The shingles vaccine (Shingrix) is now a recombinant, non-live vaccine, which means it can be given to immunosuppressed patients. This is a meaningful shift from the older live shingles vaccine (Zostavax), which was contraindicated in immunosuppressed individuals. If you are over 50 and on prednisone, Shingrix is both safe and recommended, though your antibody response may be somewhat lower than it would be off the drug.

Pneumococcal vaccines are another priority. People on long-term corticosteroids are at increased risk of pneumococcal pneumonia, making vaccination particularly important for this group. As the rheumatoid arthritis data showed, prednisolone alone did not impair pneumococcal vaccine responses, so there is good reason to stay up to date with this vaccine regardless of your steroid use.

Annual influenza vaccination is consistently recommended for people on immunosuppressive therapy, with the specific caveat that you should receive the injectable (inactivated) form rather than the nasal spray (live attenuated) version. The body of evidence on influenza vaccination during prednisone therapy is among the most robust, and it consistently shows adequate immune responses at moderate steroid doses.

What the Immune System Is Actually Doing

Prednisone suppresses the immune system by dampening inflammation broadly, which is why it works for so many different conditions. It reduces the number and activity of several types of white blood cells, lowers the production of inflammatory signaling molecules, and shifts the balance of the immune response. One effect relevant to vaccination is that corticosteroids tend to push the immune system away from the type of response best suited to fighting infections and toward a pattern less effective at clearing pathogens.

Research in animal models has illustrated this shift directly. Mice treated with dexamethasone (a potent corticosteroid) before vaccination with a standard BCG vaccine showed poor immune activation and a skewed antibody profile associated with weaker pathogen defense. However, a modified version of the BCG vaccine engineered to secrete an immune-stimulating signal was able to overcome the corticosteroid-induced suppression entirely, producing strong immune activation even in the immunocompromised animals.¹⁴ While this is laboratory research rather than a clinical finding, it illustrates that the immunosuppression caused by corticosteroids is not an absolute wall. The right immune signals can still punch through it, which helps explain why many vaccines work adequately even in people on moderate doses of prednisone.

Practical Takeaways for Talking to Your Doctor

The conversation with your doctor should cover a few specific points. First, whether the vaccine you need is live or inactivated, because that distinction drives the safety question. Second, what dose of prednisone you are on and for how long, because a short burst under 20 mg daily is treated very differently from months of high-dose therapy. Third, whether you are on other immunosuppressive drugs, since the combination may matter more than the prednisone alone. And fourth, whether there is a realistic window to vaccinate before starting treatment or after tapering off, without delaying treatment that your condition needs.

For most people on prednisone, the practical answer is straightforward: get your inactivated vaccines on schedule. Do not skip the flu shot, do not delay a COVID-19 booster, and do not avoid the pneumococcal or shingles vaccine just because you are on steroids. The immune response might be somewhat reduced at higher doses, but partial immunity beats none. The only scenario that warrants genuine caution is a live vaccine during high-dose, prolonged corticosteroid therapy, and even that situation is managed by timing rather than permanent avoidance.