Health officials are monitoring a pair of new derivatives of the COVID-19 Delta variant in Western Canada — although more evidence is needed to determine whether they are more transmissible or cause more severe illness.
, where the two sublineages AY.25 and AY.27 have been detected, said this week there is no data to determine whether the Delta derivatives are more transmissible.
"Do these sublineages transmit more rapidly than the original Delta strain? We are watching very closely. They may or may not," Shahab told reporters during a briefing on Tuesday.separate press briefing"There's no evidence that it causes any more severe illness, that it evades vaccine protection, that it's significantly different from the Delta variant that has been circulating as the dominant strain in Alberta since late summer," Hinshaw said Tuesday.AY.
"Whenever variants spread widely through a population, as it has done here in Saskatchewan and Alberta, it will acquire new mutations because that's what happens every time a virus replicates," Rasmussen explained.She says the takeaway should be for those who aren't vaccinated to do so, as the vaccines are effective against the Delta variant and its new "flavours."
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