The Short Version
There is credible evidence of elevated rotavirus activity in April 2026 — including wastewater detections and media reports citing CDC data — but the claim that "cases are surging across the United States" overstates what is directly established. The highest-authority CDC sources describe predictable winter-spring seasonality and steady vaccine coverage without declaring an anomalous national surge. Wastewater signals indicate community circulation but are not equivalent to confirmed clinical case counts, and no primary surveillance data in the evidence defines a baseline against which "surging" can be measured.