Covid: Ômicron 75% of children in the United States are infected with the virus – 05/05/2022 – Balance and Health

Omicron waves in the United States have specific antibodies against coronavirus in the bodies of 3 out of 4 children and adolescents under the age of 17 in the country, which may indicate a previous infection with the virus.

This value, which represents the so-called seroprevalence rate, jumped from 44.2% among children aged 0 to 11 years and increased to 75.2% between September and December 2021, between December 2021 and February 2022 – an analysis is done every four weeks. For young people aged 12 to 17, the rate increased from 45.6% to 74.2%.

The data was released in a report by the American CDC (Center for Disease Control and Prevention) on the 26th. Analysis of blood samples to detect specific antibodies against the nucleocapsid (core protein) of SARS-Cavi-2 during the preparation period. It is possible to evaluate how this change was directly related to the emergence of the coronavirus Omicron variant in the country.

According to the survey, general seroprevalence increased between 0.9 and 1.9 percentage points in the months of September to December 2021. Between December and February, the reported increase was 33.5% to 57.7% (24.2 percentage points).

Although this increase has been observed in adults over the age of 18, the increase in the younger age group represents an increase of about 30 percentage points in the omikron period. Among the elderly, the prevalence among adults aged 18 to 49 years increased from 36.5% to 63.7%; 28.8% to 49.8%, aged 50 to 64 years; And 19.1% to 33.2% of people aged 65 and over.

Also, according to the agency, this increase in the younger age group may be directly related to the fact that children and adolescents have lower rates of vaccine coverage against covid and, thus, are more susceptible to new infections.

In January, CDC data itself pointed to a 520% ​​increase in new pediatric covid admissions compared to the pre-Omicron period, and hospitals across the country also saw an increase in respiratory symptoms in children, possibly associated with Omicron.

The coverage rate of the two-dose vaccine in the country in April was 28%, among children aged 5 to 11 years; 59% for adolescents ages 12 to 17; 69%, in adults aged 18 to 49; 80%, in people aged 50 to 64; And 90% for those 65 years of age or older.

The report requested the Ministry of Health for data on covid cases among children and adolescents aged 0 to 17 in Brazil between January and April 2022, but no response was received until the report was released. From the onset of the epidemic until February 7, 2022, 6,877 hospitalizations and 308 deaths from covid have been recorded among children.

As of this Wednesday (4), 27.08% of Brazilian children aged 5 to 11 have received both doses of the covid vaccine, according to the Press Vehicle Consortium.

For immunologist Christina Bonorino, a professor at the Federal University of Health Sciences in Porto Alegre, the data found in the United States will raise a warning for Brazil, where there are no large-scale data on antibodies against covid in the population, especially pediatrics.

“This is really worrying because we do not know in the long run what the virus is capable of doing in the body. From the evidence we have received so far, immunity after infection is very variable. So vaccination is essential.”

Researchers highlight the importance of vaccines, which are used not only against acute diseases, but also against the consequences. “There are a number of vaccines and infectious diseases that had little known about long-term consequences and we already know today. [vírus do papiloma humano], For example, one of them. There is a clear link between viral infections and the incidence of cervical or head and neck cancer in adulthood, so vaccinating children is essential to prevent it. Covid is the same thing, we don’t know what can cause coronavirus infection in children, even a few months after the infection, “he explained.

Since the onset of the epidemic, 2,927 suspected cases of SIM-P (Pediatric Multisystem Inflammatory Syndrome) have been reported in children and adolescents, according to the Health Ministry’s Epidemic Bulletin for the week 10 to 16 April 2022. Age 0 to 16. 19 years, of which 1,702 (about 58%) were confirmed, and 113 died.


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