2023-02-07-世界卫生组织-Weekly_epidemiological_update_on_COVID-19_-_8_February_2023_14页_863kb

报告摘要

New Cases and Deaths (5 February 2023):
Globally, nearly 10.5 million new cases and over 90,000 deaths were reported in the last 28 days (9 January to 5 February 2023), representing an 89% and 8% decrease, respectively, compared to the previous 28 days.
- Total confirmed cases: Over 754 million
- Total confirmed deaths: Over 6.8 million
Underestimation of Trends:
Reported case numbers may underestimate the true number of infections and reinfections due to reduced testing and reporting delays.
- Data should be interpreted with caution, as it is subject to continuous updates and adjustments.
28-Day Interval Analysis:
WHO uses a 28-day interval to smooth out weekly fluctuations and provide a clearer picture of the pandemic's acceleration or deceleration.
- Weekly data can be accessed on the WHO dashboard.

Global Sequence Data (10 January to 6 February 2023):
- 70,276 sequences were shared with GISAID, with 70,018 being the Omicron variant (99.6% of all sequences).
- Dominant Variants:
  - BA.5 and its lineages remain dominant but have declined in relative prevalence.
  - BA.2 and its lineages remain stable.
  - Pooled recombinant variants, mainly XBB.1.5, increased in prevalence to 24.6% from 8.8%.
- Other Variants:
  - BA.1, BA.3, and BA.4 and their lineages account for less than 1% prevalence.
Variants Under Monitoring:
- BF.7, BQ.1*, BA.2.75*, and XBB* are currently under close monitoring due to potential transmission advantages and fitness-related mutations.
- WHO has published two rapid risk assessments on XBB.1.5.

New Cases: 23,362 (27% decrease)
New Deaths: 99 (21% increase)
Countries with Significant Increases:
- Equatorial Guinea: +2300%
- Zambia: +443%
- Mozambique: +297%
Highest Cases: South Africa (-27%), Zambia (+443%), Réunion (-57%)
Highest Deaths: South Africa (+50%), Zimbabwe (+12%), Zambia (+220%)

New Cases: 2,103,134 (43% decrease)
New Deaths: 22,043 (14% increase)
Countries with Significant Increases:
- Jamaica: +408%
- Saint Lucia: +384%
- United States Virgin Islands: +280%
Highest Cases: United States (-27%), Brazil (-59%), Mexico (-25%)
Highest Deaths: United States (+40%), Brazil (-37%), Canada (-16%)

New Cases: 18,664 (2% decrease)
New Deaths: 231 (45% increase)
Countries with Significant Increases:
- Tunisia: +442%
- Lebanon: +121%
- Iran: +68%
Highest Cases: Lebanon (+121%), Iran (+68%), Tunisia (+442%)
Highest Deaths: Saudi Arabia (+6%), Iran (+4%), Afghanistan (+275%)

New Cases: 1,272,322 (62% decrease)
New Deaths: 13,652 (38% decrease)
Countries with Significant Increases:
- Kosovo: +131%
- Georgia: +65%
- Montenegro: +38%
Highest Cases: Germany (-59%), Italy (-66%), Russia (+5%)
Highest Deaths: UK (-32%), Italy (-40%), France (-51%)

New Cases: 7,026,725 (92% decrease)
New Deaths: 54,153 (3% decrease)
Countries with Significant Increases:
- Samoa: +638%
- Australia: +140%
- Guam: +139%
Highest Cases: China (-96%), Japan (-42%), Republic of Korea (-59%)
Highest Deaths: China (-11%), Japan (+28%), Australia (+752%)

Global Data (2–29 January 2023):
- 189,367 new hospitalizations and 3,936 new ICU admissions reported.
- Data is preliminary and subject to delays and changes.
Reporting by Region:
- European Region: 24 countries (39%) reported hospitalizations, 17 (28%) reported ICU admissions.
- Eastern Mediterranean Region: 4 countries (18%) reported hospitalizations, 6 (27%) reported ICU admissions.
- Western Pacific Region: 4 countries (11%) reported hospitalizations, 4 (11%) reported ICU admissions.
- Region of the Americas: 7 countries (13%) reported hospitalizations, 5 (9%) reported ICU admissions.
- African Region: 6 countries (12%) reported hospitalizations, 2 (4%) reported ICU admissions.
- South-East Asia Region: 1 country (9%) reported hospitalizations, no countries reported ICU admissions.
Trends in Hospitalizations:
- Only Greece showed an increase (+9%) among countries with consistent reporting.
- Others showed decreasing trends.
Trends in ICU Admissions:
- Latvia, Greece, and Mexico showed increases (+33%, +14%, +3%), respectively.

The update highlights WHO's global efforts in pandemic response and preparedness.
Key Highlights:
- Consolidation of national experiences to promote peer learning.
- Support for North Macedonia's Public Health Emergency Operations Centre.
- Genomic surveillance installation in Honduras.
- Assessment of oxygen access in Sudan.
- Survey on Ukrainian refugees in Poland.
- Strengthening health emergency readiness in Indonesia.
- Pandemic preparedness and response learning initiatives.
- WHO Contingency Fund for Emergencies (CFE) interventions.
- WHO Health Emergency Appeal 2023.

Data is based on official laboratory-confirmed cases and deaths.
Data may be incomplete and subject to continuous updates.
WHO recommends caution in interpretation due to underestimation and reporting delays.
The PHSM database transitioned to include data from WHO and the University of Oxford.
PHSM monitoring will no longer be updated on the dashboard due to reduced changes in public health measures.
Variant classifications are regularly revised based on epidemiological data and public health risk.
WHO maintains a dedicated website for tracking SARS-CoV-2 variants and their implications.
Updates on the Democratic People's Republic of Korea are excluded due to lack of reported cases.

Cohen C, Kleynhans J, von Gottberg A, et al. SARS-CoV-2 incidence, transmission, and reinfection in a rural and an urban setting: results of the PHIRST-C cohort study, South Africa, 2020–21. The Lancet Infectious Diseases. 2022;22(6):821-834.
Coronavirus (COVID-19) Infection Survey, UK: 4 November 2022 - Office for National Statistics.
Parikh S, O'Laughlin K, Ehrlich HY, et al. Point Prevalence Testing of Residents for SARS-CoV-2 in a Subset of Connecticut Nursing Homes. JAMA. 2020;324(11):1101-1103.
Real-time dashboard. Coronavirus disease 2019.
Chen Z, Azman AS, Chen X, et al. Global landscape of SARS-CoV-2 genomic surveillance and data sharing. Nature genetics. 2022;54(4).

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