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  2. 2021年12月21日 · The time it takes for an infected person to develop symptoms after an exposure is shorter for the omicron variant than for previous variants — from a full week down to as little as three days or...

  3. 2021年11月30日 · Scientists around the world are racing to characterize the omicron variant, focusing in particular on whether it is more contagious, causes more severe disease or can evade the protection of...

  4. 2021年12月28日 · People who had Covid-19 and are later reinfected with the omicron variant may experience fewer symptoms than they did during their initial bout with the virus, a small study from the Centers for...

  5. 2022年4月21日 · What should we make of all these new omicron sublineages? BA.2 and BA.2.12.1 aren't the only omicron subvariants health leaders are watching. In South Africa, two others — BA.4 and BA.5 — have ...

    • Aria Bendix
  6. 2021年12月8日 · Dec. 8, 2021, 10:22 AM PST. By Denise Chow. It's a worrisome convergence: falling antibody levels and a new variant. Scientists have warned that a coronavirus variant like omicron, which appears...

  7. 2022年1月21日 · Is omicron really less severe? ICUs more slammed than ever, doctors say People who are unvaccinated or who have underlying conditions or diseases are still most at risk for serious illness.

  8. 2022年1月28日 · According to an Oxford University study, more than 1 in 3 people experience “lingering post-Covid symptoms” up to six months after contracting the virus. Experts have identified as many as 200 ...