2023-01-18-世界卫生组织-Weekly_epidemiological_update_on_COVID-19_-_19_January_2023_17页_1mb

报告摘要

As of 15 January 2023, approximately 662 million confirmed COVID-19 cases and 6.7 million deaths were reported globally.
In the week ending 15 January 2023, 2.8 million new cases and 13,000 deaths were reported, showing a slight decrease in cases (-7%) compared to the previous 28 days.
A 7% case decrease and 20% death increase were observed in the last 28 days compared to prior weeks.
However, data is incomplete due to reduced testing during holidays, and trends may change with updated information.

Globally, Omicron variant (99.9% of sequences) dominates, with BA.5 and its descendants accounting for 70.5% of sequences in week 52.
Notable subvariants under monitoring include BF.7, BQ.1, BA.2.75, and XBB.1.5, which show enhanced neutralization resistance and potential transmission advantages.
Laboratory data indicates reduced vaccine effectiveness against Omicron, particularly for symptomatic and infectious outcomes, though severe disease VE remains higher.

Africa: Cases decreased by 40%, deaths stable; highest case increases in countries like Malawi.
Americas: Cases down 12%, deaths up 10%; US and Brazil reported significant increases.
Eastern Mediterranean: Cases up 6%, deaths up 9%; Iran and Saudi Arabia showed increases.
Europe: Cases down 35%, deaths down 40%; France and Italy had notable decreases in deaths.
SE Asia: Cases down 17%, deaths down 13%; India and Thailand experienced drops.
Western Pacific: Cases similar, deaths up 43%; Japan and China reported high volumes.

Globally, 79,246 new hospitalizations and 1,092 ICU admissions were reported in week 1 (January 2–8).
Only a small number of countries reported data; China and Ireland showed increases in hospitalizations.

Cases and deaths are being monitored, with a note on the large number of deaths recently reported, but data aggregation is incomplete.

Vaccine studies show reduced protection against Omicron, with enhanced effectiveness for severe outcomes after boosters.
Data reliability is affected by reporting delays and variable testing strategies.

展开完整摘要