New COVID-19 variant NB.1.8.1 is more contagious

covid variant - Photo 1.

COVID-19 Test - Photo: THAIRATH

According to the Huffington Post , this new COVID-19 variant was first discovered in China in January 2024 and now accounts for about 10% of SARS-CoV-2 samples sequenced worldwide , up sharply from 2.5% four weeks ago.

According to the US Centers for Disease Control and Prevention (CDC), only 20 NB.1.8.1 gene sequences have been recorded in the US, not enough to be included in the agency's official tracking system. However, if the rate continues to increase, the variant will be updated on the CDC's tracking board.

NB.1.8.1 is believed to be more transmissible due to new mutations in the spike protein that make it easier for the virus to attach to human cells. The World Health Organization believes that these mutations may reduce the effectiveness of neutralizing antibodies, making it easier for the virus to evade the immune system.

However, according to infectious disease experts, NB.1.8.1 does not cause symptoms that are too different from previous variants. People infected usually have symptoms such as a mild but persistent dry cough, stuffy nose, fatigue, fever, chills, sore throat and muscle pain. Some people say the symptoms of this variant are milder than the winter flu, but it can still be serious in high-risk people.

There is currently no evidence that NB.1.8.1 causes more severe illness or increases hospitalizations or deaths. However, this variant is becoming more common.

Regarding vaccine efficacy, scientists believe that NB.1.8.1 arose from the Omicron JN.1 strain and should remain in the target group of the 2024-2025 COVID-19 vaccine. Although the ability to prevent infection may be short-term, the vaccine remains effective in preventing severe disease. Older adults with underlying medical conditions or those working in environments with high exposure should receive a booster shot if it has been more than six months since their last vaccination or their last infection.

Most people can recover at home with rest, fluids, and pain and fever-reducing medications. However, those at high risk should contact their doctor for antiviral medications such as Paxlovid or Molnupiravir, which are most effective when taken within the first five days of symptoms appearing. If you develop danger signs such as chest pain, difficulty breathing, confusion, or difficulty concentrating, seek medical attention immediately.

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D. KIM THOA

Source: https://tuoitre.vn/bien-the-covid-19-moi-nb-1-8-1-de-lay-hon-20250609000005677.htm