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COVID-19 has changed everyone’s lives. At one time or another, most of us have had to stay at home and socially distance ourselves from others. But in some countries, people are starting to get out of lockdowns. 

The last lockdown in England started in January 2021. Relaxing the restrictions afterwards happened gradually. It depended mainly on the number of immune people. Was this a good strategy? We created a mathematical model to see if lifting the restrictions was well timed. The strategy was successful at first. But the emergence of the Delta variant changed things. Our model shows that vaccination alone may not be enough to stop another peak of hospitalisations and deaths.

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About this article

Summary of research
Researchers wanted to assess the impact of lifting the restrictions against COVID-19 in England and the emergence of the Delta variant.
Reading level
Scientific field
Key words
NGSS standards
Viral cell variation
Disease population dynamics
AP Environmental science topics
IB Biology topics
Scientific methods
Type of figure
Location of research
Scientist Affiliation
Publication date
October 2021

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