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As new coronavirus strains emerge and infect more people, questions loom over the effectiveness of vaccines.

Here’s what you need to know about the most concerning COVID-19 variants 👇 Image
1- SARS-CoV-2, the virus that causes COVID-19, keeps changing, generating new and more transmissible versions.

The concerning variants have been identified in the UK, South Africa and Brazil.

Here's what you need to know about the UK's B.1.1.7 variant: aje.io/cgxtx Image
2- The B.1.1.248 variant was first detected in early January in Brazil and is now spreading across the country. Brazil’s health minister says it is ‘three times more contagious’

Here's what you need to know: aje.io/rfjbs Image
3- The B.1.351 variant first emerged in October 2020 in South Africa and has since become the country’s dominant coronavirus strain.

Here’s what you need to know: aje.io/v9sdc Image
Do COVID-19 vaccines work on these variants?

The more a virus mutates, the less effective a vaccine becomes. In the worst-case scenario, the virus replicates to such an extent the vaccine is not adequate to help the body.

Find out more on #AJStartHere

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More from @AJEnglish

22 Feb
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Read more: aje.io/fsvlm
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For all COVID-19 news, follow our coverage here ➡️ aje.io/ptbhm
Since the start of the year, widescale anti-lockdown demonstrations leading to arrests have taken place in cities across Europe, North America and the Middle East.

What’s driving these COVID-19 lockdown protests? 👉 aje.io/r78j3
"It is temporary until we figure out these issues."

South Africa suspends AstraZeneca’s COVID-19 vaccine rollout after data showed it offered reduced protection against the variant first identified in the country.
Read 7 tweets
7 Feb
Dozens of people feared dead after a Himalayan glacier broke apart and crashed into a hydroelectric dam in India aje.io/y8vgj Image
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Read more: aje.io/v8dt9
At least 14 people dead and 170 missing after a Himalayan glacier burst in India, unleashing a devastating flash flood aje.io/zea4n Image
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