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and you grow it in eggs by the way chicken eggs nice literally wait wait yeah chicken embryonated so they get fertilized and
there's a 10 or 12 day embryo in it and you put virus in it it grows up and then you harvest it you get about 10 ml of fluid
and then you take that you treat it with formaldehyde or formalin and it inactivates the virus so it's no longer infectious
Listen to native speakers pronounce “12 day” in real conversational contexts with synchronized timestamps and subtitles.