Proactive vs. reactive COVID-19 screening in schools: Lessons from experimental protocols in France during the Delta and Omicron waves.

PNAS Nexus · 2026 · PMC13020539 · PMID 41908717

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an increasing trendno p-value reported

In period 1, the schools of Rhône showed the highest adherence, ranging from 69.7 to 82.1% with an increasing trend over time (Table 1 ).

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