2022-02-14-世界卫生组织-Weekly_epidemiological_update_on_COVID-19_-_15_February_2022_19页_2mb

报告摘要

Case Trend: New COVID-19 cases decreased by 19% week-over-week, while deaths remained stable. Cumulative cases reached over 409 million, and deaths surpassed 5.8 million.
Regional Breakdown:
- Western Pacific Region saw a 19% increase in cases.
- Americas, South-East Asia, European, and Eastern Mediterranean regions reported decreases ranging from 30% to 12%.
- Deaths increased in Eastern Mediterranean (38%), Western Pacific (27%), African (14%), and Americas (5%) regions, with stable or declining rates elsewhere.

Global Dominance: Omicron was predominant, accounting for 98.3% of global sequences, with Delta comprising 1.7%.
BA.2 Subvariant: Prevalence increased steadily (e.g., 21.09% globally by Feb 2022). It showed higher transmissibility (30% more than BA.1) and no significant change in severity or immune escape, but may evade some PCR tests.
Omicron Lineages: BA.2 spread rapidly, especially in countries like South Africa and the US, with limited shift in treatment or diagnostic performance.

Americas: 32% case decline; highest increases in islands like Falkland Islands. Deaths up slightly by 5%.
African Region: 30% case decrease; notable spikes in countries like Algeria and Congo. Death increase of 14%.
Eastern Mediterranean: 12% case rise; deaths rose by 38%.
European Region: 16% case drop; deaths unchanged.
South-East Asia: 37% case decrease; deaths up by 9%.
Western Pacific: 19% case increase; deaths rose by 27%.

Progress Highlights: Focus on strengthening responses, vaccine accessibility, surveillance, and international financing.
WHO Actions: Provided support for emergency operations, vaccination drives, and training amid evolving pandemic measures.
Technical Resources: Includes updated guidance, genomic sequencing assessments, and digital tools for tracking.

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