What is the variant? The Lambda variant, also known as “C.37,” has spread at a rapid pace through South America, reports CNBC. The variant was flagged as a “variant of interest” by the World Health Organization (WHO) on June 14. “Lambda has been associated with substantive rates of community transmission in multiple countries, with rising prevalence over time concurrent with increased Covid-19 incidence,” said the WHO in a report. Lambda is among a “whole slew” of variants that the Public Health Agency Canada is tracking by watching how it spreads and how it will respond to vaccines, said Tam. Advertisement Article content