Drop in protection given by 2 doses shows need for COVID-19 boosters, says head of Ontario's science table

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https://i.cbc.ca/1.6291487.1639851941!/fileImage/httpImage/image.JPG_gen/derivatives/16x9_460/covid-ont-20211218.JPG Protection provided by COVID-19 vaccines against infection by the novel coronavirus has waned dramatically since the highly-infectious Omicron variant started spreading across Ontario, according to data from the province’s COVID-19 Science Advisory Table.


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