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Seta SetaOmicron variant accounts for over 99% of all cases and prevails throughout the country
Data December, 2021 and January, 2022

Omicron variant accounts for over 99% of all cases and prevails throughout the country

New report shows that Omicron variant cases increased over the holiday period, underscoring the importance of genomic surveillance to map the emergence of new variants and prevent a new wave

The most recent updates about the presence of SARS-CoV-2 in Brazil’s five regions can be monitored in real time on this maps. The data is the result of scientific research by Genov, Dasa’s genome surveillance project, open to the public and aimed at monitoring COVID-19 in Brazil.

December, 2021

January, 2022

The chart bar bellow shows the behavior of the variants by state. In a left to right seeing, a timeline for the months since the beginning of the Genov project.


In this sixth report of the Genov project, we offer data from the complete sequencing of 1,578 samples collected in the first half of December (739 samples) and in the first half of January 2022 (839 samples).

The samples collected are from Dasa patients with positive RT-PCR for SARS-CoV-2.

The report again points to the importance of genomic surveillance -- given that the high incidence of the Omicron variant, coupled with the advance of vaccination, could lead to a transition from pandemic to endemic -- ensuring that SARS-CoV-2 can no longer surprise us with new variants.


1The analysis of the data for the months of December and January has shown that the process of replacement of the Delta variant for Omicron, which started in December last year, became consolidated in Brazil in January 2022.

2Omicron and its derivatives are present in over 99% of samples and prevail throughout the country.

3Since the samples analysed were collected during the first half of every month, it is evident that that Omicron spread more quickly in the 2nd half of December, the period of year-end festivities.

4While in December 2021, the Delta variant continued to prevail (87% of samples), in January this year all analysed samples were classified as Omicron in the city of São Paulo and in the northeast and southeast regions (excluding the city of Rio de Janeiro).

5The Delta variant was found in only two samples in the north, two in the midwest and two in Rio de Janeiro. The northern region presented the lowest frequency of Omicron among the 10 samples analysed (80%).


To read the 6st Genov Report in full, click here

Read all reports click here