January 29th local time, researchers tracked and analyzed the COVID-19 variant P.1 found in Manaus, the capital of the Amazon state in northern Brazil, that this variant strain may cause secondary infection of COVID-19 patients.
Este Sabino, an infectious disease scientist at the University of São Paulo, Brazil, and several researchers published a study report in the authoritative medical journal The Lancet on January 27.
During a serum sampling of blood donors in Manaus, it was found that 76% of the city’s population had contracted the novel coronavirus disease as of October 2020.
Poison. The report points out that the city of Manaus may have reached COVID-19 herd immunity at a threshold of 67% (R0=”3″) for COVID-19.
However, statistics from the Manaus City Department of Health showed that the number of hospitalized patients with COVID-19 in the city surged in January 2021, with 3,431 confirmed patients hospitalized from January 1 to 19, 6.2 times the number of hospitalized patients in the same period last month.
The second outbreak of the epidemic in Manaus, which has a large number of infected people, has caused concern in the medical community. When reviewing nucleic acid samples of the COVID-19 case in Manaus in January 2021, Brazilian researchers found that 85.4% of the virus samples were variant strain P.1.
Sabino said that there have been patients with the P.1 variant virus strain in Manaus city, and it is not ruled out that the variant virus strain P.1 can escape the human immune response, resulting in secondary infection of COVID-19 patients.
In addition to Amazon, variant virus strains have been found in the state of São Paulo in southeastern Brazil, in addition to suspected cases of infection with variant virus strains have also been found in Santa Catarina, Paraná, Ceara, Acre and Mato Grosso do Sul.
