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You should not donate blood when you're sick. In fact, the National Institutes of Health says that you should be free of cold and flu symptoms for at least 48 hours before you give blood.
Symptoms of the flu include a cough, fever, headache, chills, muscle aches, and sore throat. Cold symptoms may be similar, but colds are less likely to cause fever or headaches.
You can’t donate blood if you have a fever, a productive cough, if you do not feel well, or if you are taking antibiotics to treat a sinus, throat, or lung infection.
Guidelines on eligibility to give blood change from time to time. The most up-to-date eligibility information can be obtained by contacting the American Red Cross blood center nearest you.
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.