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So I vaccinated my horse last Monday with a six way and West Nile. On the following Sunday, his lymph nodes were swollen and then the next day (one week after vaccination), he's covered in hives. He doesn't seem to feel bad, not off of his feed, and doesn't appear to be itching. Nothing new in his feed or environment (that I can find anyway). I'm just wondering if he's experiencing vaccinosis or this is just conicidental. He's never had a problem in the past with vaccines and he's never had allergies or hives. Anybody have any thoughts?