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What is serum sickness?

Serum sickness is a side effect that can occur after you take medication for an immune system condition, or after you've been given an antiserum (a treatment that protects against certain germs or poisons, such as snake venom or rabies). Your immune system can sometimes attack a protein in the medication, causing an immune reaction. Symptoms include not feeling well, fever, rash, swollen glands, itching and joint pain, and they usually show up about one to two weeks after you've taken the drug or antiserum. Symptoms usually go away a few days after getting treatment. 

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.