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The new variant has so far been detected in 15 countries through genomic sequencing.
Pirola appears to have evolved from the Omicron subvariant BA.2, which was widely circulating in early 2022.
The variant BA.2.86 has 33 changes to its spike proteins – the spikey outer part of the virus that allows it to enter its host.
This is of the same magnitude as the number of changes found in Omicron compared to its forerunner Delta which saw it sweep the world.
The latest COVID-19 strain spreading across the world
The World Health Organisation classified BA.2.86 as a “variant under monitoring” on August 18.
This is below the classification of “variant of concern”, which would prompt the variant to get a Greek letter name like Delta or Omicron.
The United Kingdom has accelerated its vaccination program for health workers and vulnerable groups in response to the spread of the strain there.
Variant BA.2.86 so far isn’t behaving significantly differently to previous variants and there is no indication that it causes different or more severe symptoms.
However, the number of mutations has scientists concerned that it may prove resistant to current vaccines which were modelled on other variants.
WA Health simply encouraged the public to maintain current recommendations for protecting against COVID-19, including washing and sanitising hands, covering coughs and staying home if unwell.