The most effective way to prevent shingles is vaccination. The vaccine recommended in the United States, Shingrix, is 97% effective at preventing shingles in adults aged 50 to 69 with healthy immune systems, and 91% effective in adults 70 and older. Beyond vaccination, keeping your immune system strong through basic lifestyle habits plays a supporting role, since shingles reactivates when your immune defenses drop.
Why Shingles Happens in the First Place
Shingles isn’t something you “catch” from another person. It comes from the same virus that causes chickenpox. After you recover from chickenpox, the virus doesn’t leave your body. It retreats into nerve tissue near the spinal cord and brain, where it stays dormant for years or even decades. When your immune system weakens, whether from aging, stress, illness, or certain medications, the virus can reactivate and travel along nerve fibers to the skin, causing the painful blistering rash known as shingles.
About 1 in 3 people in the U.S. will develop shingles at some point in their lives. The risk climbs sharply after age 50, which is why prevention strategies focus heavily on that age group.
Who Should Get the Shingles Vaccine
The CDC recommends Shingrix for all adults aged 50 and older, regardless of whether they remember having chickenpox. Most people born before 1980 carry the virus even if they never had noticeable symptoms. The vaccine is also recommended for adults 19 and older who have weakened immune systems due to disease or medical treatment, such as organ transplant recipients, people on immunosuppressive therapy, or those living with HIV.
If you previously received the older shingles vaccine (Zostavax, which is no longer available in the U.S.), you should still get Shingrix. And if you’ve already had shingles, vaccination helps prevent it from coming back.
How Shingrix Works and How Well It Protects
Shingrix is given as two injections. The second dose is typically administered 2 to 6 months after the first. For people with weakened immune systems who need faster protection, the second dose can be given as soon as 1 to 2 months after the first. If more than 6 months pass between doses, you don’t need to start over. Just get the second shot when you can.
The protection numbers are strong. In clinical trials, Shingrix was 97% effective for adults aged 50 to 69 and 91% effective for those 70 and older. For adults with compromised immune systems, effectiveness ranged from 68% to 91%, depending on the specific condition affecting immunity. Even at the lower end, that represents substantial protection against a disease that can cause weeks of severe pain and, in some cases, long-lasting nerve damage.
What to Expect After the Shot
Shingrix has a reputation for causing noticeable side effects, and it’s worth knowing what’s normal. The most common reactions include pain, redness, and swelling at the injection site, along with muscle pain, fatigue, headache, shivering, fever, and upset stomach. These symptoms typically last 2 to 3 days.
About 17% of people in clinical trials experienced reactions severe enough to interfere with normal daily activities. Roughly 1 in 10 reported significant injection-site symptoms like pain and swelling, and about 1 in 10 had notable whole-body reactions like muscle pain or fatigue. These reactions are temporary and not dangerous, but planning your shot for a day when you can take it easy afterward is a practical move. The second dose tends to produce stronger side effects than the first.
Cost and Insurance Coverage
If you have Medicare Part D, you typically pay nothing for the shingles vaccine. Medicare covers all vaccines recommended by the Advisory Committee on Immunization Practices with no copayment or deductible. Most private insurance plans also cover Shingrix for adults 50 and older, though your out-of-pocket cost depends on your specific plan. Without insurance, the vaccine costs roughly $150 to $200 per dose, so the full two-dose series can run $300 to $400.
The Childhood Chickenpox Vaccine’s Role
Children who receive the chickenpox vaccine instead of getting the actual disease appear to have a significantly lower risk of developing shingles later in life. Research published in The Journal of Infectious Diseases found that the risk of shingles from the vaccine strain of the virus is approximately 80% lower than from the natural virus, with two-dose recipients showing even lower rates than those who got a single dose. In children born after the chickenpox vaccination program became widespread, shingles rates have dropped dramatically, falling to 0.2 per 1,000 by 2019 in the youngest age groups studied.
This means generations vaccinated against chickenpox as children may need shingles vaccination far less urgently, though long-term data is still accumulating as these cohorts age.
Lifestyle Factors That Lower Your Risk
Shingles reactivates when your immune system is struggling, so anything that supports immune function offers some degree of protection. Chronic stress is one of the most consistently identified triggers, because sustained stress hormones suppress the immune cells that keep dormant viruses in check. Poor sleep has a similar effect: consistently getting fewer than six hours reduces your body’s ability to mount an effective immune response.
Regular physical activity, a diet rich in fruits and vegetables, moderate alcohol intake, and not smoking all contribute to stronger baseline immunity. None of these measures come close to matching the protection of vaccination, but they’re especially important for people who can’t be vaccinated or who fall into lower-efficacy groups. They also matter in the gap between your first and second vaccine doses, when protection isn’t yet complete.
Preventing Spread if You Already Have Shingles
You can’t give someone shingles directly, but a person with an active shingles rash can pass the underlying virus to someone who has never had chickenpox or the chickenpox vaccine. That person would then develop chickenpox, not shingles. The virus is only contagious while the blisters are open and weeping. Once the rash scabs over, you’re no longer contagious. Before blisters appear, you also can’t spread it.
If you have an active rash, keep it covered, avoid touching or scratching the blisters, and wash your hands frequently. Stay away from pregnant women who haven’t had chickenpox or the vaccine, premature or low-birth-weight infants, and anyone with a weakened immune system until the rash has fully scabbed over.