First case of Omicron coronavirus variant identified in the U.S. – Boston, Massachusetts

Boston, Massachusetts 2021-12-01 13:57:31 –

U.. NS.Wednesday health officials reported the country’s first case Omicron variant Of the Californian coronavirus.

The case of Covid-19 was identified by the California and San Francisco Health Departments of a person who traveled to South Africa and returned on 22 November. The Centers for Disease Control and Prevention stated in the announcement. Individuals who have been fully vaccinated and have mildly improved symptoms have been isolated from positive tests on November 29. So far, health officials have stated that all close contact is negative.

At the White House briefing, Anthony Fauci, the country’s premier infectious disease official, said he had not been boosted to his knowledge.


The discovery of Omicron in the United States is not surprising. South African scientists characterized the mutations in the variant and last week sounded a global warning about the potential threat it poses, but it has already begun to spread quietly. About 20 countries, from the UK to Australia and Israel, have already reported cases, many of them travelers.

This newly identified case is not necessarily the first case in the United States, but the first case detected. Genome sequencing was performed at the University of California, San Francisco, and the sequence was confirmed on the CDC.


Omicron refocuses its attention on the problems and fragmentary nature of US surveillance networks. The country’s gene sequencing infrastructure grew during the pandemic, and at a briefing on Tuesday, CDC director Rochelle Walensky said that the number of positive tests sequenced in the United States is currently 80,000 samples per week, or confirmed. He said it was 5% to 10% of the cases. This is from the beginning of the year when the agency and its partners were in sequence. Only a few thousand samples a week.. But progress was uneven. For the past 3 months, Many states were ordering and reporting Only 3% of confirmed infections.

California has a relatively robust sequencing network, with approximately 12% of infections being sequenced in the last three months.

Without stronger surveillance, it is difficult to know which iterations of the virus are there.

On Monday, a US travel ban came into force in South Africa and Botswana (an early case of Omicron was confirmed), as well as six other countries in the region. Many other countries impose their own travel restrictions, and some have suspended the arrival of international flights.

For pathogens such as coronavirus, travel bans can delay the arrival of new variants, but generally do not. Studies show..

Viruses generally follow travel patterns as they spread to new areas. San Francisco is the leading travel hub in the United States. But what happens next is subject to a lot of randomness. Many imported infections do not cause other infections, but some do cause new transmission routes. The more cases imported, the more likely it is to cause a subsequent infection.

Scientists are competing for a better understanding The threat posed by Omicron. Preliminary epidemiological evidence in South Africa suggests that it may be more contagious than the highly contagious delta mutant, and its genome may be able to circumvent at least some immunoprotection. Indicates that there is. However, it takes time for scientists to carry out research and collect evidence to confirm whether those concerns are fulfilled.

Apart from Omicron, the United States has revived in recent weeks in mountainous western, midwestern, and northeastern states, primarily due to infectious delta variants, the arrival of low temperatures, and the pockets of unprotected people. .. According to the latest CDC data, more than 80,000 Americans are still infected daily.

Megan Molteni contributed to the report.

First case of Omicron coronavirus variant identified in the U.S. Source link First case of Omicron coronavirus variant identified in the U.S.

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