As winter approaches, demand for COVID-19 testing could triple

Visual form

Seasonal multi-curve line chart.

Layout / body structure

The chart is a single seasonal time-series chart. Read it left to right across the year and compare the different influenza curves as they rise from low spring levels toward winter peaks.

What is being compared

The chart compares influenza or influenza-like-illness patterns across different years to show how winter symptom surges can multiply demand for COVID-19 testing.

Measurement system

The main measure is seasonal illness level over time. The chart emphasizes the relative winter peak versus the lower spring baseline rather than one fixed absolute count.

Visible structure inside the graphic

Several yearly flu curves share the same calendar axis, each with its own height, curve, and peak timing. The repetition of multiple winter peaks makes the seasonal testing-pressure story visible.

Main takeaway from the visual

The chart shows that winter sharply increases the pool of people with symptoms that resemble COVID-19. That seasonal surge creates a testing-demand problem even if COVID-19 case patterns themselves do not rise at the same rate.

Key standout values or extremes

The page anchors the comparison around a threefold effect: flu-like symptoms are, on average, three times higher in winter than in spring, implying that COVID-19 testing demand could triple during winter months.

Controls / sequence, when applicable

This is a static chart image with no in-chart controls to operate.

Companion media, when applicable

There is no separate companion audio or video; the chart image is the full visual on this page.