此報告在9月30日研究56位自願參加者，只在bioRvix網站公佈。
此網站明確標示：they have not been formally peer-reviewed and should not guide health-related behavior or be reported in the press as conclusive
根據BioNTech官網：
As seen in real world data released from the Israel Ministry of Health, vaccine efficacy in preventing both infection and symptomatic disease has declined six months post-vaccination, although efficacy in preventing serious illnesses remains high.