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This may be a stupid question but here it goes, I vaccinated my birds in the spring with the (killed virus)PMV-1 Vaccine. Each time I refilled the syringe I used a clean (new) needle,and held the vaccine upside down. I have some still refrigerated and the expiration date is next year (2010). Now mind you I would let the filled syringe come to room temp. before i vaccinated the birds,and put the vaccine back in the frig as I waited. Now the question is,is the vaccine still good to use, even though your suppose to use the entire contents when you open the vaccine originally.
Thank you in advance.
Thank you in advance.