Careful epidemiologicalmonitoring of circulating strains is recommended.
建议对流行株仔细进行流行病学监测。
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WHO has been monitoringepidemiological and virological evidence from all parts of the world, including both Northern and Southern Hemispheres, to determine when the pandemic is over.
This report provides all countries with a baseline for monitoringepidemiological trends and assessing the progress they are making to address noncommunicable diseases.