Honestly I don't think it is a big deal to use
Prop that was opened 9 months ago. It sounds like you kept it in good conditions. Honestly you could have introduced a virus into your system when you injected. Has the swelling gone down any and also is it still red and puffy, if is not then it is probably
Test Flu. Just keep eye on it and make sure it doesn't get any bigger. I am not real experienced in this area, so wait for other responses to see what they think also. Also if you are taking an antibiotic then you should be fine, and should you continue to use the open
Prop, I think you might try to put the vial in some boiling water for about 3-5 minutes and that should take care of any bacteria in the vial if there was any. I have done that for precaution before and then used the
test with no problems at all, and it was also opened for about 5 months. Hope this helps.
killiob