看JAMA的報告, 該篇論文統計實驗是在以色列做的, 打過三劑BNT之後的突破性感染是19.8% , 打第四劑是降低到 6.9% 是三劑BNT的19.8% , 打第四劑是降低到 6.9% 該篇報告的結論 Meaning : These findings suggest that a fourth vaccine dose was effective in preventing breakthrough COVID-19 infections in health care workers, helping to maintain the function of the health care system during the pandemic. 意義 : 這些研究結果表明,第四劑疫苗可有效預防醫護人員的突破性 COVID-19 感染,有助於在大流行期間維持衛生保健系統的功能。