The most effective way to prevent shingles is vaccination. Shingrix, the current shingles vaccine, is over 90% effective at preventing both shingles and its most dreaded complication, lasting nerve pain. Beyond vaccination, managing chronic stress and understanding your personal risk factors can further lower your chances of an outbreak.
Why Shingles Happens in the First Place
If you had chickenpox as a child, the virus never actually left your body. It went dormant in nerve cells near your spine and brain, held in check by your immune system. Shingles is what happens when that virus wakes back up, typically decades later, traveling along a nerve to the skin and causing a painful, blistering rash.
Your immune system’s ability to keep the virus suppressed depends largely on a branch called cell-mediated immunity. Anything that weakens this defense, whether aging, disease, medication, or prolonged psychological stress, gives the virus an opening to reactivate. About 1 in 3 Americans will develop shingles at some point in their lives, and the risk climbs sharply after age 50.
Shingrix: How Well It Works
Shingrix is the only shingles vaccine currently recommended in the United States. In clinical trials, it reduced the risk of shingles by 97% in adults aged 50 to 69 and by 91% in adults 70 and older. That level of protection held steady even in the oldest participants: efficacy was 91.3% among those 70 to 79 and 91.4% among those 80 and up, showing no meaningful decline with age.
The vaccine is also highly effective against postherpetic neuralgia (PHN), the burning, stabbing nerve pain that can linger for months or years after the rash heals. Shingrix was 91% effective at preventing PHN in adults over 50 and 89% effective in those over 70. Since PHN is the complication most people fear, and the one most likely to disrupt daily life, this protection alone makes vaccination worthwhile.
Who Should Get Vaccinated and When
The CDC recommends Shingrix for all adults 50 and older, regardless of whether they remember having chickenpox. (Most adults born before 1980 carry the virus even if they never had a noticeable case.) The vaccine is given as two doses, spaced 2 to 6 months apart. Both doses are necessary for full protection.
Adults 19 and older with weakened immune systems qualify for the vaccine earlier. This includes people living with HIV, those on immunosuppressive medications for conditions like rheumatoid arthritis or Crohn’s disease, organ transplant recipients, and people undergoing chemotherapy. For immunocompromised individuals who need protection quickly, the second dose can be given as soon as 1 to 2 months after the first.
If you previously received Zostavax, the older live shingles vaccine that’s no longer available, the CDC still recommends getting Shingrix. And if you’ve already had shingles, vaccination is still recommended, because the virus can reactivate more than once.
Shingles Can Come Back
Many people assume shingles is a one-time event, but recurrence is more common than previously thought. A study tracking nearly 1,700 people with a confirmed shingles episode found that 95 of them experienced at least one recurrence over an average follow-up of about seven years. Some had two or three additional episodes. Having shingles once does not make you immune to it, which is another reason vaccination matters even after an outbreak.
The Role of Stress
Chronic psychological stress is one of the clearest non-age-related triggers for shingles. The mechanism is straightforward: prolonged stress suppresses the cell-mediated immune responses that keep the dormant virus in check. Research suggests it’s the sustained, grinding kind of stress, not a single bad week, that creates vulnerability. People with chronic mood disorders, long-term caregiving burdens, or persistently high-stress work environments face elevated risk.
This doesn’t mean a stressful month will automatically trigger shingles. But if you’re in a prolonged high-stress period, especially if you’re over 50 or have other risk factors, the virus has a better chance of reactivating. Stress management techniques like regular exercise, adequate sleep, and psychological support aren’t a substitute for vaccination, but they do support the immune function that keeps the virus dormant.
What About Vitamin D and Other Supplements?
You may have seen claims that vitamin D can prevent shingles. A large study using UK Biobank data, which tracked hundreds of thousands of participants, found no association between vitamin D levels and shingles risk after adjusting for age, sex, and other factors. People with deficient, insufficient, and sufficient vitamin D levels all developed shingles at essentially the same rate. Neither vitamin D supplementation nor prescription vitamin D was linked to lower shingles incidence. There is currently no supplement with solid evidence for preventing shingles reactivation.
If You Do Get Shingles, Protect Others
Shingles itself isn’t contagious in the way chickenpox is. You can’t give someone shingles. But the fluid in shingles blisters contains live virus, and direct contact with it can cause chickenpox in someone who has never had it or been vaccinated against it. The virus can only spread while blisters are open and weeping, not before they appear or after they’ve scabbed over.
During an active outbreak, cover the rash, wash your hands frequently, and avoid close contact with pregnant women who’ve never had chickenpox, premature or low-birth-weight infants, and anyone with a weakened immune system. Once the blisters have fully crusted over, the risk of transmission drops to zero.
Shingrix Side Effects to Expect
Shingrix is known for causing noticeable side effects, which can catch people off guard. Sore arm, fatigue, muscle aches, and headache are common, especially after the second dose. Some people feel unwell enough to take a day off from their usual activities. These reactions typically resolve within two to three days and are a sign of your immune system responding to the vaccine. They’re a worthwhile trade for 90%-plus protection against a condition that can cause weeks of pain and, in some cases, months of nerve damage.