Key takeaway: Authors of the study (pre-peer review) assert that the Covid vaccine effectively prevent hospitalizations but do not urge that the vaccine effectively prevents transmissions. Their research shows a significant waning in the effectiveness of the vaccines after six months. "Effectiveness against SARS263 CoV-2 infections waned during the six months of this study, falling from 88% (86‒89) within one month after being fully vaccinated to 47% (43‒51) ≥5 months after being fully vaccinated . . . These findings are consistent with preliminary reports from the Israel Ministry of Health and US CDC showing reductions in effectiveness of BNT162b2 against infections ≥5 months after being fully vaccinated . . ."

STUDY: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3909743