How Vaccines Affect Covid-19 Outbreaks Worldwide | World news

Nearly six months after the first Covid-19 vaccines were approved for emergency use, Guardian analysis shows that the vast majority of the world should not yet see a substantial benefit.

Supply shortages, security concerns, public apathy and slow rollout have meant that most countries still rely on severe lockdowns and other quarantine measures to reduce the severity of their outbreaks.

Clear gaps have emerged between the handful of countries where vaccination coverage is high, those that are struggling to ramp up their programs, and the many, mostly poor, countries that have so far received only a trickle of vaccine doses.

By charting the changes in mortality rates since January 31, based on vaccination rates in each country, you get a snapshot of the state of the race to vaccinate the world against the virus. This is what it tells us.

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Vaccination coverage data comes from Our World in Data and shows the total number of vaccinations in a given country for every 100 people. Countries that have not yet registered a vaccination coverage have not been included.

Deaths come from Johns Hopkins University. The change in deaths since January 31 is calculated by calculating the percentage change in deaths between the two-week period to January 31 and the two-week period to April 19.

Countries that do not yet have a documented vaccination coverage are excluded. Countries with an increase of more than 1,000% and fewer than five deaths in the two weeks to January 31 were excluded, so low baselines do not distort the international picture.

The lockout stringency data comes from the government’s Oxford Covid-19 response tracker. The change is calculated by comparing a country’s mean stringency score in February with the mean stringency score in April. A change of -10 or less was used to identify the countries that have opened up significantly in the past two months.

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