Shingles itself is not contagious, but the virus that causes it can spread to people who have never had chickenpox
You cannot catch shingles from someone who has shingles. The virus that causes shingles—varicella-zoster—spreads through direct contact with the fluid in shingles blisters, but when it reaches a person who has never had chickenpox, that person develops chickenpox, not shingles. If you have already had chickenpox or the chickenpox vaccine, you cannot get chickenpox again from someone with shingles, and you cannot catch shingles from them either.
The distinction matters because it changes who needs to take precautions. A person with shingles poses no risk to vaccinated adults or to anyone who has had chickenpox. The risk is only to unvaccinated people who have never had chickenpox—primarily young children and, rarely, unvaccinated adults.
Key Takeaways
- Shingles spreads only through direct contact with fluid from the blisters, not through the air or casual contact.
- Only people who have never had chickenpox can contract the virus from shingles, and they will develop chickenpox, not shingles.
- The risk is highest for infants under one year old and pregnant women who have never had chickenpox.
- Keeping shingles blisters covered with a bandage or clothing stops transmission almost entirely.
- People with shingles can return to normal activities once blisters are fully crusted over, usually 7 to 10 days after they appear.
How the virus actually spreads from person to person
The varicella-zoster virus lives in the fluid inside shingles blisters. Transmission happens only when that fluid touches the skin or mucous membranes of someone who has never had chickenpox. This requires direct contact—touching the blisters themselves or touching a surface contaminated with the fluid, then touching your face or mouth before washing your hands.
The virus does not travel through the air. You cannot catch it by breathing the same air as someone with shingles, sitting across a room from them, or being in the same building. Casual contact—shaking hands, hugging, sharing food or drinks—does not spread it unless the person with shingles has uncovered blisters on their hands and those hands touch your mucous membranes or an open wound.
The contagious period lasts from when the first blisters appear until they are completely crusted over. This usually takes 7 to 10 days. Once the blisters have crusted, the fluid is no longer present and transmission cannot occur.
Who is actually at risk
Only people who have never had chickenpox are at risk of catching the virus from shingles. In the United States, this group is small and shrinking. Most people born before 1995 had chickenpox as children. Most people born after 1995 received the chickenpox vaccine, which provides immunity. Unvaccinated children and unvaccinated adults make up the remaining group at risk.
Within that group, certain people face higher risk of serious illness if they do contract chickenpox. Infants under one year old have immature immune systems and can develop severe chickenpox. Pregnant women who have never had chickenpox can develop pneumonia or other complications. People with weakened immune systems—from HIV, chemotherapy, or immunosuppressant medications—can develop severe disease. These groups should take precautions around someone with active shingles.
Healthy vaccinated children and vaccinated adults face no risk. Even if they somehow contracted the virus, their immune system would recognize it and prevent infection.
What "covered" actually means for stopping spread
A simple bandage or piece of gauze taped over shingles blisters stops transmission. The barrier prevents the fluid from contacting other people's skin. Clothing that covers the affected area works the same way. A person with shingles on their torso can cover it with a shirt. A person with shingles on their leg can cover it with pants or a bandage.
The covering does not need to be sterile or medical-grade. Regular adhesive bandages work. Gauze and tape work. The goal is simply to prevent the fluid from making contact with another person's skin or mucous membranes. If the blisters are on the face or another area that cannot be easily covered, keeping hands away from the face and washing hands frequently after touching the area reduces risk substantially.
Once blisters are fully crusted over, covering is no longer necessary because there is no fluid to transmit.
Shingles and pregnancy: the specific concern
A pregnant woman who has never had chickenpox and is exposed to shingles faces a real but small risk. The concern is not that shingles will harm the fetus directly—the virus does not cross the placenta in the way some other infections do. The concern is that if the pregnant woman develops chickenpox, the infection itself can cause complications including pneumonia, which can be serious during pregnancy.
If you are pregnant and have never had chickenpox, you should avoid direct contact with someone who has active shingles blisters. If you are unsure whether you have had chickenpox, a blood test can determine whether you have immunity. If you do not have immunity, the chickenpox vaccine is not safe during pregnancy, but it can be given after delivery.
If a pregnant woman without immunity is exposed to shingles, she should contact her obstetrician. Antiviral medications exist that can reduce the severity of chickenpox if given early, and a doctor can advise whether they are appropriate in her situation.
When someone with shingles can be around others safely
A person with shingles can be around vaccinated people and people who have had chickenpox without restriction. These people cannot contract the virus. A person with shingles can also be around unvaccinated people as long as the blisters are covered and remain covered during any contact.
Once the blisters are fully crusted over—usually 7 to 10 days after they first appear—a person with shingles is no longer contagious and can be around anyone without precautions. At that point, the virus is no longer present in the fluid on the skin.
For people in high-risk groups—infants, pregnant women without immunity, or immunocompromised people—the safest approach is to avoid direct contact until blisters are completely crusted. This is not because shingles is highly contagious, but because the consequences of chickenpox in these groups can be serious.
The difference between shingles contagiousness and chickenpox contagiousness
Chickenpox spreads through the air. A person with chickenpox can infect others by coughing or sneezing, and the virus can travel across a room. One person with chickenpox typically infects 10 to 12 unvaccinated people who are exposed to them. Shingles spreads only through direct contact with blister fluid and is far less contagious. A person with shingles rarely transmits the virus even to unvaccinated people in the same household.
This difference exists because chickenpox affects the respiratory tract and spreads through respiratory droplets. Shingles affects only the skin and spreads only through direct contact with the blisters. The same virus causes both diseases, but the way it spreads is completely different.
For this reason, someone with shingles does not need to isolate the way someone with chickenpox does. Covering the blisters and practicing hand hygiene is sufficient to prevent transmission.
Frequently Asked Questions
Can I catch shingles from someone who has shingles?
No. If you have had chickenpox or the chickenpox vaccine, you have immunity to the varicella-zoster virus and cannot develop shingles from exposure to someone else's shingles. Shingles develops only when the virus that has been dormant in your own nerve tissue reactivates, not from catching it from another person.
What if I touch shingles blisters and then touch my face?
If you have had chickenpox or are vaccinated, nothing happens—your immune system prevents infection. If you have never had chickenpox and are unvaccinated, you could develop chickenpox. Washing your hands immediately after touching the blisters reduces risk. The virus survives on skin for a limited time, so hand-washing is effective.
Is it safe for someone with shingles to care for a baby?
Only if the blisters are completely covered. Infants under one year old have not yet received the chickenpox vaccine and are at risk of severe chickenpox if exposed to the virus. A caregiver with shingles can safely hold and care for an infant as long as all blisters are covered with bandages or clothing and hands are washed before touching the baby.
Can shingles spread through saliva or sweat?
Shingles spreads only through the fluid inside the blisters themselves. Saliva and sweat do not contain the virus unless they are contaminated with blister fluid. Sharing food, drinks, or utensils with someone who has shingles does not transmit the virus.
How long should someone with shingles stay away from work or school?
A person with shingles can return to work or school once blisters are covered, which is usually possible from day one. There is no need to stay home if the blisters can be kept covered. Once blisters are fully crusted over—typically 7 to 10 days—no covering is needed and there is no contagion risk at all.