Yes, you can generally go to work if your child has chickenpox, as long as you are not developing symptoms yourself. The virus spreads from person to person through direct contact with the rash or through respiratory droplets from an infected person. Simply being in the same household as a sick child does not make you contagious. The key question is whether you’re immune to chickenpox, because if you’re not, you could catch it yourself and then become a risk to others.
Why You’re Probably Not a Risk to Coworkers
Chickenpox spreads from people who are actively infected, not from healthy household contacts. You cannot carry the virus on your clothes or skin and pass it to someone else at work. The varicella-zoster virus is fragile outside the body, surviving on surfaces for only a few hours and occasionally up to a day or two. So even if you’ve been around your sick child, you’re not walking into the office coated in live virus.
The only scenario where you’d need to stay home is if you develop chickenpox yourself. A person with chickenpox is contagious starting one to two days before the rash appears, which is worth keeping in mind. If you’ve never had chickenpox or been vaccinated, you could be incubating the virus without knowing it yet. The incubation period is typically 14 to 16 days after exposure, so symptoms wouldn’t show up right away.
How to Know If You’re Immune
Most adults are immune to chickenpox, either from a childhood infection or vaccination. The CDC considers any one of the following as evidence of immunity:
- Previous infection: If you had chickenpox as a child, confirmed or verified by a healthcare provider, you’re immune.
- Vaccination: Two doses of the varicella vaccine for adults provides strong protection.
- Birth year: Adults born in the United States before 1980 are generally presumed immune, since the virus circulated so widely before the vaccine era. (This presumption doesn’t apply to healthcare workers, pregnant women, or people with weakened immune systems.)
- Blood test: A lab test can confirm whether you have antibodies against the virus.
If you meet any of those criteria, the chance of you catching chickenpox from your child is very low. If you’re unsure whether you’ve had it or been vaccinated, a simple blood test from your doctor can settle the question.
What If You’re Not Immune
If you’ve never had chickenpox and haven’t been vaccinated, you’re at real risk of catching it from your child. In that case, you could develop the infection yourself about two to three weeks after your child’s rash appeared. You’d become contagious a day or two before your own rash shows up, meaning you could unknowingly expose coworkers during that window.
This matters most if you work around people who are vulnerable. Pregnant women who catch chickenpox face a risk of serious complications, primarily pneumonia, which can occasionally be fatal. People with weakened immune systems, such as those on chemotherapy or immunosuppressive medications, can develop life-threatening complications including infection of internal organs, pneumonia, hepatitis, and encephalitis. If your workplace includes people in these categories, being cautious is especially important.
If you’re not immune, talk to your doctor about getting vaccinated. The vaccine can sometimes still offer protection if given shortly after exposure.
Special Rules for Healthcare Workers
The rules are stricter if you work in a healthcare setting. Hospitals and clinics have specific protocols for staff exposed to chickenpox at home. Any healthcare worker who develops chickenpox or is suspected of having it must be excluded from work immediately, and they cannot return until every blister has crusted over. The birth-before-1980 presumption of immunity does not apply to healthcare workers; you’ll need documented vaccination, a confirmed history of infection, or a positive blood test.
Even if you’re immune, your employer may want to know about the household exposure. Check your workplace’s occupational health policy, as some facilities require you to report it so they can monitor you during the incubation period.
Your Child’s Contagious Window
While you’re heading to work, your child needs to stay home. Children with chickenpox are contagious from one to two days before the rash appears until every blister has dried into a scab. New crops of blisters typically keep appearing for four to five days after the rash starts, so the whole process from first spot to fully crusted usually takes about a week. Your child shouldn’t return to school or daycare until there are no remaining fluid-filled blisters.
During this time, try to limit your child’s contact with anyone who might be vulnerable: pregnant women, newborns, and anyone with a compromised immune system.
An Unexpected Upside for Parents
If you had chickenpox as a child, the virus stays dormant in your nerve cells for life and can reactivate later as shingles. Here’s the surprising part: being around your child’s chickenpox may actually help you. A large study published in The BMJ found that adults who were exposed to a child with chickenpox in their household were 33% less likely to develop shingles in the two years following exposure. That protective effect didn’t fade quickly either. Adults remained about 27% less likely to develop shingles even 10 to 20 years after exposure. The theory is that encountering the live virus again gives your immune system a natural boost against reactivation.