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Since the beginning of the covid-19 pandemic, Acre has monitored the circulation of various variants of the Sars-Cov-2 virus.
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Four Variants of COVID-19 circulate in Acre since the beginning of the pandemic/Photo: Reproduction
According to data from the State Secretariat of Health (Sesacre), consulted by the ContilNetthe following strains have been identified in the state:
Variants identified in Acre
1. Omicron BA.2-like
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Emergence: End of 2021.
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Features: Omicron subvariant, known as “stealth omicron”, with greater transmissibility and ability to escape immunity induced by anterior infection or vaccination.
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Impact: Contributed to the increase of cases in various regions, including Acre.
2. XBB
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Emergence: Autumn of 2022.
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Features: Recombinant variant of omicron, resulting from the combination of lineages BA.2.10.1 and BA.2.75. XBB demonstrated high transmissibility and partial resistance to antibody neutralization.
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Impact: He circulated widely in Brazil, including Acre, during the 2023 outbreaks.
3. JN.1.1
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Emergence: September 2023.
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Features: Ba.2.86 underline, with specific mutations that may affect interaction with the immune system.
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Impact: Identified in several countries, including Brazil, with the potential to become dominant in some regions.
4. XDR
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Emergence: End of 2023.
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Features: Recombinant lineage derived from the variants JD.1.1 and JN.1.1, with high transmissibility and antibody resistance.
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Impact: It spread quickly throughout Brazil, including Acre, during the outbreaks of 2023.
Immunization has been a great ally in combating the virus/Photo: Reproduction
Variant NB.1.8.1, known as “Nimbus”, has been monitored by the World Health Organization (WHO) since January 2025 due to its characteristic symptom of intense sore throat, described as a “shaving blade” sensation.
Despite its dissemination in various regions, including America, Europe and Asia, there are no records of its circulation in Acre so far. Sesacre did not identify cases of this variant in the state.
Current situation of COVID-19 in Acre
Although the most critical phase of the pandemic has passed, COVID-19 remains one of the main causes of severe acute respiratory syndrome (SRAG) in Acre.
In 2025, 47 cases and 9 deaths related to the disease in the state were confirmed. In addition, Acre faces challenges related to low vaccination coverage, with rates far below the recommended goals, which increases the risk of outbreaks and complications associated with Covid-19.
