Home » How effective are vaccines against variants? Data and differences between vaccinated and non- breaking latest news

How effective are vaccines against variants? Data and differences between vaccinated and non- breaking latest news

by admin
of Silvia Turin

For those who have completed the vaccination cycle in our country, very high efficacy against hospitalizations (94.6%) and deaths (95.8%)

According to the latest Italian data reported by the Istituto Superiore di Sanit (relating to the rapid survey of June 22), the Alfa variant spread at 57.8% and the Delta at 22.7% and the Gamma at 11.8%.
In this picture how effective are vaccines on our territory?

How much vaccines protect in Italy

The new ISS Surveillance Bulletin provides a precise table on various aspects concerning the efficacy of the vaccines used (Pfizer, AstraZeneca, Moderna and Johnson & Johnson) in the period concerning cases diagnosed between April 4 and July 11.
The effectiveness of vaccines measured in comparison to the cases diagnosed among the unvaccinated and divided as follows:

efficacy towards cases of infection:
after 1 single dose of the 71,33%
after 2 doses of the 88,52%
towards hospitalizations:
after 1 single dose of80,83%
after 2 doses of the 94,57%
towards hospitalizations in intensive care:
after 1 single dose of88,08%
after 2 doses of the 97,3%
towards deaths:
after 1 dose of the 79,01%
after 2 doses of the 95,8%

The greatest protection of the fully vaccinated especially from severe forms of the disease and the lower vaccination efficacy in the case of a single dose and against simple contagion, given that vaccines are designed to protect against the serious consequences of Covid.

The unvaccinated are 81% of ICU admissions

The report recalls that most of the cases reported in Italy have been identified (in the last 14 days) in subjects not fully vaccinated. Specifically, in the 80+ age group, in the last 30 days, 36% of SARS-CoV-2 diagnoses, 50% of hospitalizations, 81% of ICU admissions and 66% of deaths have occurred in people who have not received any vaccine doses and are currently 9.5% of the population in this age group. It should be noted that among the hospitalized cases these are much more frequently borne by the unvaccinated population.

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Effectiveness UK and Israel

To make a comparison with updated data from the real world, the vaccines used in the UK (AstraZeneca and Pfizer) towards hospitalizations have an efficacy after the first dose of 80% against Delta and 78% against Alpha and after two doses of 96% against Delta and 93% against Alpha. In Israel, where 57% of citizens have completed the vaccination course, the Ministry of Health reports that Pfizer’s effectiveness for protecting against the Delta variant drops to 64% from 94% against other strains. Compared to severe disease, the efficacy rate is down by only 5%: in May, the vaccine‘s efficacy rate in preventing hospitalizations was 98.2%, while in June with the Delta 93%.

July 17, 2021 (change July 17, 2021 | 16:39)

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