Overview
Cowpox is a rare viral infection caused by the cowpox virus, which belongs to the Orthopoxvirus family — the same family that includes smallpox and monkeypox viruses. Historically, cowpox was known for infecting milkmaids who handled infected cows, and it famously played a role in the development of the first smallpox vaccine by Edward Jenner in the late 1700s. Note that this Orphanet entry is marked as 'OBSOLETE,' meaning it may have been reclassified or merged with another entry in current medical databases. Cowpox infection typically affects the skin. After contact with an infected animal, a person develops a red, painful sore (lesion) at the site of contact, usually on the hands or fingers. This sore progresses through stages — from a flat red spot to a raised bump, then a fluid-filled blister, and finally a deep, dark scab (eschar). The surrounding skin may become swollen and red. Some people also experience fever, tiredness, and swollen lymph nodes near the affected area. In most healthy individuals, the infection clears on its own within several weeks without specific treatment. However, cowpox can be much more serious in people with weakened immune systems, such as those on immunosuppressive medications, people with HIV/AIDS, or those with certain skin conditions like eczema. In these individuals, the virus can spread widely across the body and may become life-threatening. Treatment is mainly supportive, focusing on wound care and managing symptoms. Antiviral medications may be considered in severe cases.
Key symptoms:
Painful red sore or lesion at the site of animal contactFluid-filled blisters that develop into deep scabsSwollen lymph nodes near the infected areaFeverTiredness and feeling unwellRedness and swelling around the soreMultiple skin lesions in severe casesSkin ulcerationPain at the wound sitePossible secondary bacterial infection of the wound
Sporadic
Usually appears on its own, not inherited from a parent
Variable
Can begin at different ages, from infancy through adulthood
Treatments
No FDA-approved treatments are currently listed for OBSOLETE: Cowpox infection.
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Specialists
View all specialists →No specialists are currently listed for OBSOLETE: Cowpox infection.
Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to OBSOLETE: Cowpox infection.
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Caregiver Resources
NORD Caregiver Resources
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Mental Health Support
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Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.How can I tell if my wound is getting infected with bacteria on top of the cowpox?,Am I at higher risk for complications because of any other health conditions I have?,How long should I expect it to take for the lesion to fully heal?,What precautions should I take to avoid spreading the virus to family members?,Should I be tested for immune system problems if my infection is severe?,Are there any antiviral treatments that might help in my case?,When is it safe for me to return to work or school?
Common questions about OBSOLETE: Cowpox infection
What is OBSOLETE: Cowpox infection?
Cowpox is a rare viral infection caused by the cowpox virus, which belongs to the Orthopoxvirus family — the same family that includes smallpox and monkeypox viruses. Historically, cowpox was known for infecting milkmaids who handled infected cows, and it famously played a role in the development of the first smallpox vaccine by Edward Jenner in the late 1700s. Note that this Orphanet entry is marked as 'OBSOLETE,' meaning it may have been reclassified or merged with another entry in current medical databases. Cowpox infection typically affects the skin. After contact with an infected animal,
How is OBSOLETE: Cowpox infection inherited?
OBSOLETE: Cowpox infection follows a sporadic inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.