Covid-19: drop in positivity signals shorter wave than previous ones, says Instituto Todos pela Saúde

After rising for five weeks, test positivity for SARS-CoV-2 peaked at 41% in the week ending November 19 and then began to fall. In the week ending November 26, the percentage of positive tests was 33%, a sign that the third wave of Ômicron should be less acute than the previous ones. Analyzes are from the Todos pela Saúde Institute (ITpS) based on data from the Dasa, DB Molecular and HLAGyn laboratories. O Curto News is a partner with ITpS to disseminate accurate and uncomplicated information about Covid-19.

According to ITpS, despite the drop in positivity in the week ending on the 26th, in age groups from 40 years old the percentage of positive tests reaches 47%.

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Waves have different characteristics

The first wave of Ômicron, which began in December 2022, lasted two and a half months and the peak remained for two weeks.

The second, starting in April, was the longest: it lasted four and a half months and had a peak week.

The third wave, which began in October, has so far month and a half, and a peak also of one week. Good news!

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Although the third wave of Ômicron appears to be falling, the positivity rate of 33% is still high, which which indicates high contagion of the SARS-CoV-2 virus.

Stay alert and protect yourself

The recommendation of the ITpS is:

  • up-to-date vaccination (three, four or five doses, depending on age and health condition)
  • I wear a mask especially in closed and poorly ventilated spaces
  • hand hygiene and testing whenever suspected.

Age groups

In relation to age groups, positivity increases, in general, as age advances.

In the last week evaluated, the rate was 11% in children aged 0 to 4 years and 5 to 9 years. It then rose to 23% in the 10 to 19 age group.

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The highest percentages were observed in people aged 50 to 59 and over 80 (47%), 70 to 79 years old (46%) and 60 to 69 years old (45%). See below all the percentages and the comparison with previous weeks.

Covid in the states

Positivity is falling in São Paulo (40% to 35%) and Rio de Janeiro (45% to 36%).

There was a fluctuation in Minas Gerais (28% to 29%) and continues to grow in Goiás (27% to 34%).

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O ITpS highlights that Brazil, being a huge country, has different pandemic dynamics within its territory. Test positivity is a indicator of viral transmissions.

In Partnership with Curto News and ITpS

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