The single most effective way to avoid shingles is getting the Shingrix vaccine, which is recommended for all adults 50 and older. But vaccination is only part of the picture. Because shingles is caused by a virus already living inside your body, prevention also involves keeping your immune system strong enough to keep that virus dormant.
Why Shingles Is Different From Other Infections
You can’t “catch” shingles the way you catch a cold. If you had chickenpox as a child, the varicella-zoster virus never actually left your body. It retreated into nerve cells near your spine and brain, where it can sit quietly for decades. Shingles happens when that virus reactivates, traveling along a nerve to the skin and producing a painful, blistering rash.
About 1 in 3 people in the United States will develop shingles at some point in their lifetime. The risk climbs sharply after age 50, largely because the immune system naturally weakens with age, a process researchers call immunosenescence. This gradual decline in cellular immunity is the primary reason the virus finds an opening to reactivate.
Get the Shingrix Vaccine
Shingrix is a two-dose vaccine given as a shot in the upper arm. The CDC recommends it for all immunocompetent adults aged 50 and older, with the second dose given 2 to 6 months after the first. Both doses are necessary for full protection. In clinical trials, Shingrix was more than 90% effective at preventing shingles in adults 50 and older, and it maintained strong protection even in people over 70.
A few situations people commonly ask about:
- You’ve already had shingles. You should still get vaccinated. Shingles can recur, and Shingrix helps prevent future episodes. There’s no required waiting period after an outbreak. Just make sure the rash has fully cleared before getting your first dose.
- You received the older Zostavax vaccine. Zostavax, a live vaccine, was discontinued in the U.S. in 2020. If you received it years ago, the CDC still recommends getting Shingrix for stronger, longer-lasting protection.
- You’re not sure if you had chickenpox. Most adults born before 1980 in the U.S. carry the virus, even if they don’t remember being sick. Vaccination is still recommended.
Side effects are common but short-lived. Most people experience soreness at the injection site, and some get fatigue, muscle aches, or a low fever for a day or two after each dose. The second dose tends to cause more noticeable side effects than the first.
What It Costs
If you have Medicare Part D, you typically pay nothing for Shingrix. Part D plans are not allowed to charge a copayment or apply a deductible for vaccines recommended by the CDC’s Advisory Committee on Immunization Practices. Most private insurance plans also cover the vaccine with no out-of-pocket cost for adults 50 and older. Without insurance, the two-dose series can run $300 to $400 total, though manufacturer assistance programs exist.
Keep Your Immune System in Fighting Shape
Since shingles reactivates when immune defenses drop, anything that supports your immune system reduces your risk. This matters most for people who aren’t yet eligible for the vaccine or who want additional protection on top of it.
Chronic stress is one of the most commonly cited triggers. Prolonged stress suppresses the immune cells responsible for keeping dormant viruses in check. People often develop shingles during or shortly after a period of intense emotional or physical strain, such as a death in the family, surgery, or a major illness. Regular sleep, physical activity, and stress management aren’t just general wellness advice. They directly affect the immune surveillance that keeps varicella-zoster virus dormant.
Certain medical conditions significantly raise shingles risk. Cancer (particularly blood cancers like leukemia and lymphoma), HIV, and autoimmune diseases all weaken the immune system. So do the medications used to treat them, including chemotherapy, long-term corticosteroids, and drugs given after organ transplants to prevent rejection. If you take any immunosuppressive medication, your risk is meaningfully higher than average, and vaccination becomes especially important. Adults 19 and older with weakened immune systems are eligible for Shingrix on an earlier timeline than the general population.
Nutrition plays a supporting role. Deficiencies in zinc, vitamin C, and vitamin D have all been linked to impaired immune function. You don’t need megadoses or specialty supplements. A varied diet with adequate protein, fruits, vegetables, and whole grains covers the basics. Smoking and heavy alcohol use both suppress immune function and are worth addressing for shingles prevention alongside their many other health effects.
Who Faces the Highest Risk
Age is the single biggest risk factor. The older you are, the less effectively your immune system monitors dormant viruses. People over 60 account for a disproportionate share of shingles cases, and the complications, particularly postherpetic neuralgia (nerve pain that persists for months or years after the rash heals), become more common and more severe with age.
Beyond age, genetics play a role that most people aren’t aware of. Certain variations in immune-related genes make some people inherently more susceptible to shingles. Research published in The Journal of Infectious Diseases identified specific genetic markers in the immune system’s cell-identification machinery that were significantly more common among people who developed shingles. You can’t change your genetics, but knowing that family history of shingles may signal higher personal risk can motivate earlier vaccination.
Immunocompromised individuals face the most serious risk. This includes people undergoing cancer treatment, organ transplant recipients on anti-rejection drugs, and anyone with a condition or medication that suppresses immune function. For these groups, shingles can be more severe, longer-lasting, and more likely to cause complications affecting the eyes, brain, or internal organs.
If Someone Near You Has Shingles
You cannot catch shingles from another person. But you can catch chickenpox from someone with an active shingles rash if you’ve never had chickenpox or the chickenpox vaccine. The virus spreads through direct contact with fluid from the blisters or, less commonly, by breathing in virus particles released from open blisters.
The contagious window is specific: a person with shingles can spread the virus only while the rash has open, fluid-filled blisters. Once the blisters scab over, they’re no longer contagious. Before blisters appear, there’s no risk of transmission either.
If you have shingles and want to protect the people around you:
- Cover the rash with a bandage or loose clothing.
- Avoid touching or scratching the blisters, and wash your hands frequently for at least 20 seconds.
- Stay away from high-risk individuals until the rash scabs over completely. This includes pregnant women who never had chickenpox or the vaccine, premature or low birth weight infants, and anyone with a weakened immune system.
A Realistic Prevention Plan
For most adults, shingles prevention comes down to a short checklist. If you’re 50 or older, get both doses of Shingrix on schedule. If you’re immunocompromised and between 19 and 49, talk to your doctor about early vaccination. Regardless of age, protect your immune system through consistent sleep, regular physical activity, balanced nutrition, and managing chronic stress. And if you’ve already had shingles once, don’t assume you’re immune to a second round. Vaccination after an episode is both safe and recommended.