The claim
醫學期刊《刺針》一篇研究顯示接種疫苗後8個月有效率會跌至負數，代表疫苗者免疫力下降。
Sources and attribution
Original review: Factcheck Lab. Structured data compiled by Data Commons under CC BY 4.0. Publisher article content is subject to its own terms.
Updated
The claim
Original review: Factcheck Lab. Structured data compiled by Data Commons under CC BY 4.0. Publisher article content is subject to its own terms.
Updated