How Long Does Natural Immunity Actually Last After a Spring COVID Infection?

Getting sick is never fun-but there are a few perks. You get to sleep a lot. Your partner might shower you with your favorite foods. And then there's the benefit that comes after you're done being sick-natural immunity. Although it's never guaranteed, after certain illnesses, there may be a period of natural immunity that can safeguard you against another infection.

It's something that can come about after having a COVID infection. In fact, according to one 2023 study, among those who had been infected with COVID-19 at least once, 88% or more still had natural immunity against severe versions of the disease (i.e., being hospitalized or death) 10 months afterwards. But keep in mind that this is all dependent on what variants are going around, since your body will have natural immunity against one variant but perhaps not another.

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Spring can see frequent COVID cases, since the effectiveness of fall vaccines can start to wane, and people tend to travel more as soon as the warm weather returns, which can increase exposure to others. It's also hard to tell the difference between a COVID infection and spring allergies.

Natural immunity can arise from a COVID infection, and you may be wondering-how long does natural immunity actually last after a spring COVID infection?



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COVID and Natural Immunity

Dr. Ashley L. Drews, MD FACP, System Epidemiologist and Medical Director of Infection Prevention and Control at Houston Methodist, says when discussing COVID or other types of infections, natural immunity refers to immunity developed in response to a natural infection rather than immunity derived from immunization.

"Most people develop natural immunity to subsequent COVID infections following natural infection. This immunity is not long-lasting, and as new COVID variants develop and circulate, a person will again be at risk for infection, even after natural infection," she explains.

While natural immunity does sound promising, Dr. Drews says that vaccination has still been shown to be beneficial to those with prior COVID infection, and it is thought likely to improve the durability and breadth of protection.

Natural immunity can also come about after colds or flu, but there can be so many variants of these that it can be hard to hold onto that natural immunity.

"The problem is there are so many cold viruses, so a person never develops natural immunity to all of them, and for influenza, it changes so frequently that immunity past infection does not always confer robust immunity to the currently-circulating strain," Dr. Drews explains.

Related: Getting COVID Again Is More Dangerous Than Most People Realize-Here's What To Know

What To Know About Spring COVID Infections

There can be an uptick in COVID cases in the spring, especially when we're at the tail end of the surge of winter infections. But in general, Dr. Drews says that there are certain factors that determine the severity of an infection rather than the time of year that the infection is acquired.

"The severity of a COVID infection depends upon the virulence of the circulating variant and the infected person's immunity (natural from prior infection(s) and vaccine-induced) combined with underlying immunodeficiency and other health conditions such as chronic lung disease," Dr. Drews says.

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How Long Does Natural Immunity Actually Last After a Spring COVID Infection?

Spring, or any season, isn't a determining factor for how long you'll have natural immunity after a COVID infection. It's the same across the board, no matter what time of year it is.

"Natural immunity tends to wane relatively quickly after natural infection, typically within about three months," Dr. Drews says. "However, even after this time, there is a ‘memory' response, and subsequent infections tend not to be as severe. There is no difference in duration of immunity based upon the season of the infection."

The Benefits of Natural Immunity

"The benefits of natural immunity are great," Dr. Drews says. "Natural immunity helps to reduce the risk of reinfection with the same organism twice, and also tends to reduce the severity of infection if reinfection does occur."

That said, it's always a good idea to get the most up-to-date version of the COVID vaccine to help protect from severe infection-or prevent any kind of infection at all.

Up Next:

Sources:

• Ashley L. Drews, MD FACP, System Epidemiologist and Medical Director of Infection Prevention and Control at Houston Methodist.
• The Lancet: "Past SARS-CoV-2 infection protection against re-infection: a systematic review and meta-analysis"

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This story was originally published April 20, 2026 at 1:25 PM.