https://blog.wongcw.com/2021/02/06/%e7%be%8e%e5%9c%8b%e7%88%86%e7%99%bc%e8%87%b4%e5%91%bd%e5%a4%a7%e8%85%b8%e6%a1%bf%e8%8f%8c%e7%96%ab%e6%83%85%e4%bd%86%e6%ba%90%e9%a0%ad%e4%b8%8d%e6%98%8e/
美國爆發致命大腸桿菌疫情但源頭不明