https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/975909/S1182_SPI-M-O_Summary_of_modelling_of_easing_roadmap_step_2_restrictions.pdf
UK: SPI-M-O: Summary of further modelling of easing,restrictions – Roadmap Step 2 (31st of March 2021)
32. The resurgence in both hospitalisations and deaths is dominated by those that have received two doses of the vaccine, comprising around 60% and 70% of the wave respectively.
56. This shows that most deaths and admissions in a post-Roadmap resurgence are in people who have received two vaccine doses, even without vaccine protection waning or a variant emerging that escapes vaccines.
"safe and effective"