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The variant delta of coronavirus, present in 185 countries, has largely replaced the other three disturbing variants, alfa, beta and gamma, which now represent less than 1% of sequenced cases, specifies today the World Health Organization.
All viruses, including SARS-CoV-2 responsible for covid-19, they change over time.
The appearance at the end of 2020 of variants which presented a greater risk to global public health led the health agency to distinguish between variants that should be “watched” and others “of concern”, in order to prioritize surveillance and research activities at the global level .
“The predominant virus currently circulating is the variant delta. And in fact, less than 1% of the sequences currently available are Alfa, Beta and Gamma“said the chief of the covid-19 technical team of the WHO, Maria Van Kerkhove, during a question-and-answer session on social media.
“This virus has become stronger, is more transmissible and is in competition, replacing other viruses that are circulating,” he said, noting that it had so far been recorded in 185 countries, reported the ‘Press Agency. AFP.
Currently the WHO envisages four disturbing variations, all named with letters of the Greek alphabet to avoid stigmatizing a particular country and to make it easier for the public to pronounce their nomenclatures.
The organization also considered that five other variants (Eta, Iota, Kappa, Lambda and Mu) they must be “watched”.
However, three of them (Eta, Iota and Kappa) were downgraded, Van Kerkhove said, according to the French agency.
The variant mu It was first detected in Colombia, where it sparked the country’s deadliest pandemic wave.
The lambdaDuring this time, it was first detected in Peru before spreading to other countries.
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