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  2. 2021年12月21日 · What are omicron symptoms: Omicron subvariants may have different symptoms than previous Covid strains. What to look out for.

  3. 2021年12月15日 · The CDC studied 43 people infected with the variant, one of whom was hospitalized for two days, and found that the most commonly reported symptoms were cough, fatigue and congestion or a runny nose.

  4. 2023年9月16日 · Sore throat, then congestion: Common Covid symptoms follow a pattern now, doctors say. Doctors who treat Covid describe the ways the illness has gotten milder and shifted over time to mostly ...

  5. 2021年12月4日 · By Rhoda Kwan. Six more U.S. states confirmed their first cases of the Covid-19 omicron variant Friday, as experts warned the highly contagious delta variant will likely remain the greater threat ...

  6. 2022年6月15日 · The results, published Wednesday in JAMA Network Open, showed that the rapid tests caught 63% of positive cases, meaning they produced quite a few false negatives. The accuracy varied ...

  7. 2022年9月2日 · How, where and when to get updated Covid booster shots. The CDC recommended updated boosters, which target the original virus as well as the omicron BA.4 and BA.5 subvariants, for adults and...

  8. 2023年2月16日 · While protection from severe disease remained high, people could be reinfected — particularly with an omicron subvariant — consistent with evidence that protection against having symptoms ...