![](/img/logo/vendor/harvard-health-logo-long.png)
Symptom Checker
Step 4: Read and complete the decision guide to learn more about your symptoms.
Positive Rheumatoid Factor
Okay.
And, have you had a fever (temperature of more than 100.8F)?
Related documents
Disclaimer: This content should not be considered complete and should not be used in place of a call or visit to a health professional. Use of this content is subject to specific terms of use & medical disclaimers.