Shingles itself does not spread from person to person
The virus that causes shingles — varicella-zoster — lives dormant in nerve tissue after you recover from chickenpox. When it reactivates years or decades later, it causes shingles. You cannot catch shingles from someone who has it. The person with shingles cannot transmit shingles to another person.
What can spread is the varicella-zoster virus itself, but only to people who have never had chickenpox and are not vaccinated against it. When that happens, the exposed person develops chickenpox, not shingles. The virus then lies dormant in their nerve tissue, just as it does in everyone who has had chickenpox, and may reactivate as shingles later in life.
Key Takeaways
- A person with shingles can transmit varicella-zoster virus to unvaccinated people who have never had chickenpox, but those people will develop chickenpox, not shingles.
- The virus spreads through direct contact with the shingles rash, particularly the fluid inside the blisters, not through coughing or sneezing.
- Once the shingles rash crusts over completely, the person is no longer contagious.
- People who have had chickenpox or received the chickenpox vaccine cannot catch the virus from someone with shingles.
- Covering the rash and practicing good hand hygiene are the main ways to prevent spreading the virus to vulnerable people.
How the virus travels from a shingles rash to another person
The varicella-zoster virus lives in the fluid inside the blisters of a shingles rash. Direct contact with this fluid is how the virus spreads. Touching the rash and then touching another person, or touching contaminated surfaces that someone else then touches, can transmit the virus.
The virus does not spread through the air. You cannot catch it by breathing the same air as someone with shingles, and it does not spread through coughing or sneezing. This is different from chickenpox, which spreads more easily through respiratory droplets. Shingles is a less contagious form of the same virus.
The rash typically appears in a band or strip on one side of the body, most often on the torso or face. Not all parts of the rash are equally contagious — the fluid-filled blisters pose the highest risk. Once the blisters have crusted over and dried, the person is no longer contagious, even if the crusts are still visible.
Who is at risk of catching the virus from shingles
Only people who have never had chickenpox and have not received the chickenpox vaccine can catch varicella-zoster from someone with shingles. This includes infants too young to be vaccinated and people whose immune systems prevent them from receiving live vaccines.
People who have had chickenpox in the past are immune to the virus and cannot catch it again from someone with shingles, even if they have never had shingles themselves. Similarly, people who have received the chickenpox vaccine (varicella vaccine) are protected and cannot catch the virus from a person with shingles.
Pregnant people who have never had chickenpox face a particular concern: infection during pregnancy can harm the developing fetus. If you are pregnant and have not had chickenpox or the vaccine, avoid contact with anyone who has shingles and speak with your doctor about your risk.
Steps to prevent spreading the virus
The most effective way to prevent transmission is to keep the rash covered. Wear clothing that covers the affected area, or use a clean bandage if the rash is on an exposed part of your body. This blocks direct contact between the fluid in the blisters and other people's skin.
Wash your hands frequently, especially after touching the rash or changing bandages. Do not touch your face or other parts of your body after touching the rash, as you can spread the virus to yourself. Avoid sharing towels, washcloths, or other items that may contact the rash.
If you have shingles, stay away from people you know have never had chickenpox, particularly infants and pregnant people who are not immune. Once the rash has completely crusted over, you no longer need to take these precautions.
The difference between shingles transmission and chickenpox transmission
Chickenpox spreads easily through the air when an infected person coughs or sneezes. A single exposure can infect someone who is not immune. Shingles, by contrast, requires direct contact with the rash fluid and is much less contagious overall.
This difference exists because chickenpox is a primary infection — the virus is actively multiplying throughout the respiratory system and body. Shingles is a reactivation of dormant virus in a localized area of nerve tissue. The virus is present in smaller amounts and in a limited location, making airborne spread impossible.
Someone with chickenpox can infect others for several days before the rash appears and for as long as new blisters are forming. Someone with shingles is contagious only while the rash has fluid-filled blisters, which typically lasts one to two weeks.
What happens if an unvaccinated person is exposed
If someone who has never had chickenpox comes into contact with the fluid from a shingles rash, they may develop chickenpox. This usually happens within 10 to 21 days after exposure. The person will experience the typical chickenpox symptoms: fever, fatigue, and a widespread rash that starts as red bumps and progresses to fluid-filled blisters.
Chickenpox in adults tends to be more severe than in children, with higher fevers, more extensive rashes, and a greater risk of complications. After the chickenpox infection clears, the virus remains dormant in nerve tissue, and that person may develop shingles later in life, just like anyone else who has had chickenpox.
If you know you have been exposed to shingles and have never had chickenpox, contact your doctor. Antiviral medication started within a few days of exposure may reduce the severity of chickenpox if infection occurs.
Frequently Asked Questions
Can I get shingles from someone else who has shingles?
No. You cannot catch shingles from another person. If you have had chickenpox or received the chickenpox vaccine, you are immune to the virus and cannot develop chickenpox or shingles from exposure to someone with shingles.
Is it safe to be around someone with shingles if I have been vaccinated?
Yes. The chickenpox vaccine protects you from infection with varicella-zoster virus. You cannot catch the virus from someone with shingles if you have been vaccinated, even if you have never had chickenpox.
How long is someone with shingles contagious?
A person with shingles is contagious from the time the rash appears until all the blisters have completely crusted over. This typically takes one to two weeks. Once the crusts have formed and dried, the person is no longer able to spread the virus.
What should I do if I am pregnant and exposed to shingles?
Contact your doctor right away. If you have never had chickenpox and are not vaccinated, your doctor may recommend antiviral medication or other steps to reduce your risk. Chickenpox infection during pregnancy can pose risks to the developing fetus, so medical guidance is important.
Can shingles spread through saliva or sharing food?
The virus is present in the fluid inside the blisters, not in saliva. Sharing food or drinks with someone who has shingles does not transmit the virus unless the rash is on or near the mouth and there is direct contact with blister fluid.