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Lin mark this message contains misinformation
originally written by Lin
疫苗並非即期品,在過往的藥物及疫苗中,都有做過實驗來確立維持最佳效價的時間有多長,藥廠會在依據此數據,訂定有效期限的時間範圍。目前AZ疫苗看到的最佳保值期限是六個月,這就代表在六個月的有效範圍內的成分品質最穩定,疫苗效價是最佳的。

References

https://tfc-taiwan.org.tw/articles/5219

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