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  1. Coronavirus disease (COVID-19) - World Health Organization (WHO)

  2. Coronavirus disease (COVID-19) - World Health Organization (WHO)

  3. Coronavirus disease 2019 (COVID-19) - Symptoms and causes

  4. Coronavirus disease (COVID-19) - World Health Organization (WHO)

  5. Long COVID: Lasting effects of COVID-19 - Mayo Clinic

  6. COVID-19 epidemiological update – 6 November 2024

  7. COVID-19 epidemiological update – 24 December 2024

  8. Coronavirus disease (COVID-19): How is it transmitted?

  9. Milestone: COVID-19 five years ago - World Health Organization …

  10. 冠状病毒病(COVID-19) - World Health Organization (WHO)