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  2. Covid: CDC urges immunocompromised to take precautions after ...

    www.cnbc.com/2023/01/27/covid-cdc-urges-immuno...

    The CDC urged people with weak immune systems to wear masks and practice social distancing after Covid subvariants knocked out Evusheld. Evusheld was a key antibody treatment taken by...

  3. Omicron sub-variant XBB.1.5 accounts for 61.3% of U.S. COVID ...

    www.reuters.com/news/picture/omicron-sub-variant...

    Omicron sub-variant XBB.1.5 accounts for 61.3% of U.S. COVID cases - CDC FILE PHOTO: People wear masks as a protection against the coronavirus disease (COVID-19) pandemic in New York City,...

  4. Face masks during the COVID-19 pandemic - Wikipedia

    en.wikipedia.org/wiki/Face_masks_during_the...

    A cloth face mask is worn over the mouth and nose and made of common textiles such as cotton. Masks vary widely in effectiveness, depending on factors such as material, fit and seal, and number of layers. They are usually less effective at filtering than surgical masks and offer much less protection.

  5. Experts say China’s population had almost no underlying natural immunity before reopening, while existing Chinese vaccines offer limited protection against infection from Omicron, so one massive wave ended up sweeping over the whole country – hitting rural and urban areas almost simultaneously. 01 china covid deaths intl RESTRICTED