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What is the COVID risk in the UK after 36 million single vaccination?

The latest report published by NHS shows until the Good Friday and before Easter holiday, the number of people who have received a first dose COVID-19 vaccination in the UK is totally 31,301,267. Also, 4,948,635 people received the second dose of the COVID-19 jab.

Later City News: Released data confirms that more than half of the adults in Britain have now received at least one dose of Covid-19 vaccine. It is equal with 45.53% of total population.

The Guardian reported that The Joint Committee on Vaccination and Immunisation, which recommended delaying booster shots for three months in Britain, estimates that after three weeks the first Pfizer shot has an efficacy of about 90% and the first AstraZeneca shot has an efficacy of about 70%. This means that whatever your risk of getting symptomatic Covid beforehand, it is roughly 90% or 70% lower, depending on which shot you have. But these numbers must be treated with caution.

The second shot is intended to boost the immune response and make protection more long-lasting. Recent data from AstraZeneca’s US trial found that two shots of its vaccine achieved an efficacy of 76%, but the doses were given closer together than in Britain.

A recent Lancet study showed that when the booster was delayed by 12 weeks or more, efficacy rose to 81%, compared with 55% when the shots were given less than six weeks apart. The Pfizer booster pushes efficacy up to 95% when given three weeks after the first shot, but the impact of delaying the booster is unclear.

The vaccination programme in the UK began on 8 December 2020 with people receiving the vaccine developed by Pfizer/BioNTech, and people began receiving the Oxford University/AstraZeneca vaccine from 4 January 2021. Both vaccines are given as 2 doses, at least 21 days apart, for a full vaccination course.

Initially the vaccines were prioritised to be admini