And while the omicron variant caused less severe disease overall, the sheer number of infections during this wave is across the country.
The government of Rio de Janeiro announced the detection of a new variant of the coronavirus in the interior of that state next to the border with São Paulo, both located in the southeastern region of Brazil, the most populated in the country.
And more information and inputs are needed to establish a concrete report on NeoCoV.
As the virus further evolves, vaccines may become even less effective.
By the end of this year, that figure could approach 1.
An alternate description may be used if the variant is not easy to describe using this nomenclature.