Yes, you can get sepsis more than once, and surviving a first episode actually makes a second one more likely. Roughly half of sepsis survivors are readmitted to the hospital within six months, and nearly half of those readmissions involve a new infection. The reason comes down to lasting changes in your immune system that can persist for months or even years after recovery.
How Common Recurrent Sepsis Is
The numbers are striking. About one in seven sepsis survivors (14.5%) end up back in the hospital within 30 days. By six months, that figure climbs to nearly half. In one study tracking patients over a median of about 18 months, 60% were readmitted at least once, and infections accounted for 45% of those readmissions.
These aren’t small risks. Sepsis survivors face a substantially higher chance of serious infection compared to people who’ve never had sepsis, and that elevated risk is highest in the first weeks and months after discharge. It does gradually decrease over time, but for many survivors the vulnerability persists well beyond the initial recovery period.
Why Sepsis Changes Your Immune System
During sepsis, your body launches an intense inflammatory response to fight off infection. But that response triggers a powerful counter-reaction designed to dial inflammation back down. When this counter-reaction overshoots, it essentially suppresses your immune system, a state sometimes called immune paralysis. Your immune cells die off in larger numbers than normal, and those that survive don’t function as well.
Several specific problems develop. White blood cells called neutrophils, which are your body’s first responders to new infections, lose their ability to migrate effectively to infection sites. Other immune cells become less capable of recognizing and presenting threats to the rest of the immune system. Certain types of immune cells that help you fight new infections drop in number, while cells that suppress immune activity increase. The net effect is an immune system that’s less prepared to handle a new pathogen walking through the door.
These changes aren’t just temporary. Research shows that mitochondrial dysfunction (problems with how your cells produce energy) and lasting modifications to how your genes are expressed both contribute to prolonged immunosuppression. For some survivors, immune function takes months to recover. For others, it may never fully return to baseline.
A Second Episode Is Usually a New Infection
One important finding: when sepsis comes back, it’s typically not the same bug causing trouble again. A study examining 90-day readmissions found that only about 19% of recurrent sepsis cases were definitively caused by the same organism infecting the same site. Half of all readmissions were confirmed to be entirely new infections, with a different pathogen, a different location in the body, or both. The remaining third were unclear because cultures came back negative during one of the hospitalizations.
This matters because it tells us something fundamental about what’s happening. Recurrent sepsis isn’t usually a relapse of an old infection that wasn’t fully treated. It’s your weakened immune system failing to contain a completely new threat, one it might have handled without difficulty before the first episode.
Who Faces the Highest Risk
Certain factors significantly raise the likelihood of a second sepsis episode. A systematic review and meta-analysis identified several consistent predictors:
- Older age is one of the strongest and most consistent risk factors across studies.
- Existing chronic conditions like heart disease, kidney disease, diabetes, or liver problems increase vulnerability substantially. The more conditions you have, the higher the risk.
- Longer initial hospitalization correlates with greater risk, likely because it reflects a more severe first episode.
- Being discharged somewhere other than home, such as a nursing facility or rehabilitation center, is associated with higher readmission rates.
- Lower socioeconomic status and reduced access to outpatient care also elevate risk.
Organ damage from the first episode plays a direct role too. Sepsis can leave lasting harm to the kidneys, liver, heart, and lungs. Reduced function in any of these organs makes your body less resilient to new infections and less capable of tolerating the stress of fighting one off. A person who comes out of sepsis with impaired kidney function, for example, is starting from a weaker position if a new infection develops.
Recurrent Sepsis Is More Dangerous
A second episode isn’t just an inconvenience. It carries significantly higher mortality. In one study, only 45% of patients readmitted with an infection survived, compared to 71% of those readmitted for non-infectious reasons. Being readmitted for an infection-related cause was independently associated with roughly double the risk of death, even after accounting for age and other factors. Separately, 30-day readmission after sepsis was linked to a 47% one-year mortality rate regardless of the reason for readmission.
The compounding effect is part of what makes recurrent sepsis so dangerous. Each episode can cause additional organ damage, further suppress immune function, and reduce the body’s reserves for recovery. Survivors who were already weakened from the first round have less margin to absorb the impact of a second.
Reducing Your Risk After Sepsis
Because the risk of recurrence is highest in the weeks and months after discharge, that window is where prevention efforts matter most. Staying current on vaccinations is one of the most straightforward steps, since a weakened immune system is less forgiving of preventable infections like influenza or pneumonia.
Early and consistent follow-up with a primary care provider after discharge helps catch new infections before they escalate. Medication review at discharge is also important, since gaps or errors in prescriptions during the transition home can contribute to complications. Managing chronic conditions like diabetes, kidney disease, or heart failure more aggressively can lower the baseline risk of infection and improve your body’s ability to respond if one develops.
Emerging evidence suggests that sepsis may be what’s called an ambulatory care sensitive condition, meaning that better outpatient management of underlying health problems could prevent not just readmissions but first episodes too. For survivors, that means the quality of your ongoing primary care after discharge directly influences whether a second episode happens.