COVID-19 vs Seasonal Flu, on the Same Funnel
"Is COVID worse than the flu?" is the most-asked comparison in respiratory disease, and the reason it has no settled answer is that people compare figures with different denominators. This page puts the two viruses on the same CDC-modelled season, the same five metrics and the same denominator definitions, so that the one comparison which does hold can be made — and the ones that do not can be seen not to.
How to read this page. The tables are the network's two data records side by side — nothing is re-typed, so a figure here is exactly the figure on each virus's own page, with the same source, tier and date. A fatality rate is only comparable when its denominator is the same, and it usually is not; each cell carries its denominator note, and the prose below says which comparisons hold and which do not. An empty cell is a stated absence of measurement, not a low number.
The Figures, Side by Side
COVID-19 (SARS-CoV-2)
A respiratory illness caused by the SARS-CoV-2 coronavirus and spread mainly through the air; most cases are mild, but it can cause severe pneumonia, especially in older adults and people with underlying conditions.
Common in the US Circulates year-round across the US and is one of the country's leading causes of respiratory hospitalization and death.
Seasonal influenza
The seasonal flu, a contagious respiratory illness caused by influenza viruses that circulate each winter; it ranges from mild to severe and is preventable by annual vaccination.
Common in the US Circulates every US winter, causing tens of millions of illnesses and tens of thousands of deaths a year.
United States, side by side
| Metric | COVID-19 (SARS-CoV-2) | Seasonal influenza |
|---|---|---|
| Annual Exposure / Cases | 10,400,000–16,700,000 CDC MMWR — Respiratory Virus Activity, United States, July 1, 2024–June 30, 2025 primary source as of 2026-02-19 | 51,000,000 CDC — 2024-2025 Influenza Season Summary: Severity, Disease Burden, and Burden Prevented primary source as of 2026-03-12 |
| Severe Outcome Rate | Data not available | Data not available |
| Hospitalization Rate | Data not available | Data not available |
| Case Fatality Rate | 0.2–0.51% CDC MMWR — Respiratory Virus Activity, United States, July 1, 2024–June 30, 2025 primary source as of 2026-02-19 Of symptomatic illnesses (2024–25 modeled season); varies widely by variant, age, and vaccination. | 0.09% CDC — 2024-2025 Influenza Season Summary (deaths ÷ illnesses, both same-season US modeled estimates) primary source as of 2026-03-12 Of symptomatic illnesses (CDC modeled burden). |
| Annual Deaths | 34,000–53,000 CDC MMWR — Respiratory Virus Activity, United States, July 1, 2024–June 30, 2025 primary source as of 2026-02-19 | 45,000 CDC — 2024-2025 Influenza Season Summary: Severity, Disease Burden, and Burden Prevented primary source as of 2026-03-12 |
| Reported cases per 100,000 residents | Data not available | Data not available |
COVID-19 (SARS-CoV-2) — record note: Illness/hospitalization/death figures are Oct 1, 2024–Jul 5, 2025 modeled range estimates; COVID-19 is no longer nationally notifiable, so no clean confirmed-case count exists. cases_per_100k is left UNAVAILABLE. case_fatality_rate_pct is now shown as a BOUNDING RANGE (0.2-0.5%) rather than a point: the low bound is the smallest deaths / largest illnesses and the high bound the reverse, so it honestly spans the uncertainty in the two published ranges instead of inventing a single pairing. The 'How a figure changes over time' trend for COVID shows two honestly-separate NCHS death-certificate series (they must not be merged): deaths involving COVID-19 (underlying or contributing) — 377,883 (2020), 460,513 (2021), 244,986 (2022), 76,446 (2023) — and the narrower underlying-cause-only count — 345,323 (2020), 415,399 (2021), 186,702 (2022), 49,928 (2023). Both use a different method than the current-season modeled figure shown as the live value, so they are not directly comparable to it.
Seasonal influenza — record note: 2024-25 was classified 'high severity' — the most severe season since 2017-18. CDC's own long-run range (2010-2025) is 9.4M-51M illnesses and 6,300-52,000 deaths, so this single season sits at the top of that range. case_fatality_rate_pct is a same-record derivation (deaths ÷ illnesses, both CDC 2024-25-season modeled estimates) per SITE-PLAYBOOK.md §12a; both inputs are model-based CDC burden estimates, not raw notified counts, since seasonal influenza isn't individually reportable. The illnesses and deaths trends use CDC's modeled disease-burden estimates (same method each season), one point per season from 2017-18 through 2024-25 — deaths: 52,000 (2017-18), 28,000 (2018-19), 22,000 (2019-20), 6,300 (2021-22), 21,000 (2022-23), 28,000 (2023-24), 45,000 (2024-25). The 2020-21 season is intentionally absent: CDC published no burden estimate for it because influenza circulation was minimal under COVID-19 mitigation. These modeled burden figures are NOT the smaller coded death-certificate counts, which are a different series and are not mixed in.
Global, side by side
| Metric | COVID-19 (SARS-CoV-2) | Seasonal influenza |
|---|---|---|
| Annual Exposure / Cases | Data not available | 1,000,000,000 WHO — Influenza (seasonal) fact sheet primary source as of 2025-02-28 |
| Severe Outcome Rate | Data not available | Data not available |
| Hospitalization Rate | Data not available | Data not available |
| Case Fatality Rate | Data not available | Data not available |
| Annual Deaths | Data not available | 290,000–650,000 WHO — Influenza (seasonal) fact sheet primary source as of 2025-02-28 |
COVID-19 (SARS-CoV-2) — global note: WHO's dashboard counts 7,116,554 deaths and 779,366,737 cases reported to WHO cumulatively through 30 August 2026. Those are cumulative totals, and the annual slices are not comparable to the US single-season figures: only 26,889 deaths were reported to WHO for calendar year 2025, from 46 of 240 reporting countries and areas, because global COVID-19 surveillance has wound down — the annual global cells are therefore left UNAVAILABLE rather than charted as a misleading side-by-side. For scale, WHO estimates about 14.9 million excess deaths were associated with the pandemic worldwide in 2020–2021 (range 13.3–16.6 million; WHO news release, 5 May 2022), far more than the deaths officially reported over that period.
Seasonal influenza — global note: WHO estimates ~1 billion seasonal influenza cases worldwide each year, including 3–5 million cases of severe illness and 290,000–650,000 respiratory deaths. Fact sheet re-read 2026-09-15: dated 28 February 2025 (the date now carried here) and unchanged — the ~1 billion cases and 290,000–650,000 deaths are WHO's standing estimates, restated rather than re-derived.
Sources behind every figure above
- CDC MMWR — Respiratory Virus Activity, United States, July 1, 2024–June 30, 2025 primary source as of 2026-02-19
- WHO — COVID-19 dashboard: deaths reported to WHO (data through 30 August 2026) primary source as of 2026-08-30
- CDC — 2024-2025 Influenza Season Summary: Severity, Disease Burden, and Burden Prevented primary source as of 2026-03-12
- WHO — Influenza (seasonal) fact sheet primary source as of 2025-02-28
What the Comparison Shows
The comparison that holds: fatality per symptomatic illness, same season, same method. Both fatality rates in the US table are CDC's modelled-burden figures for the 2024–25 respiratory season and both are "of symptomatic illnesses" — the denominator note on each cell says so. On that basis COVID-19 killed 0.2–0.51% of the people it made ill and influenza 0.09%: roughly two to five times the per-illness lethality, depending on where in COVID's range the truth sits. That range is itself honest bookkeeping — the record explains that the low bound is the smallest death estimate over the largest illness estimate and the high bound the reverse.
Why the death counts look alike anyway. Influenza's 45,000 deaths and COVID's 34,000–53,000 come from very different bases: about 51 million influenza illnesses against 10.4–16.7 million for COVID-19. Flu made three to five times as many people sick; COVID killed a larger share of a smaller number. A reader who compares only deaths concludes "about the same"; one who compares only fatality rates concludes "COVID is several times worse"; both are reading one column of a two-column answer.
What cannot be compared. Neither record has a US hospitalization or severe-outcome rate, for the reason the Risk Perspective states on every card: no agency publishes a population-wide rate with a clean denominator for either virus, and the cell is left blank rather than filled from a single study. Globally, influenza has a WHO annual estimate (about a billion cases, 290,000–650,000 respiratory deaths); COVID-19 does not, because reporting to WHO has wound down to a few dozen countries — the record's global note gives the cumulative totals and says why the annual cells stay empty. A global COVID-vs-flu comparison is therefore not made here, and any page that makes one is comparing a modelled annual figure with a fraction of a reporting system.
The moving parts. COVID's fatality rate "varies widely by variant, age, and vaccination", as its denominator note says, and the whole comparison is one season deep. The coronavirus spoke's COVID-19 risk perspective tracks the thirteen-fold fall in COVID-NET hospitalization rates since 2020–21; the point of this page is not that the ratio is fixed, but that when it is quoted it should be quoted with its denominator.
Frequently Asked Questions
Is COVID-19 more deadly than the flu?
Per symptomatic illness in the same 2024–25 season, yes: CDC's modelled fatality is 0.2–0.51% for COVID-19 against 0.09% for influenza — about two to five times. Total deaths were similar (34,000–53,000 vs 45,000) only because influenza caused three to five times as many illnesses.
Why are the death totals so close if COVID is deadlier?
Because the illness totals are not: about 51 million influenza illnesses against 10.4–16.7 million COVID-19 illnesses in the same season. A higher rate on a smaller base produced a similar count.
Why is there no hospitalization comparison?
Neither record carries a US hospitalization rate, because no agency publishes a population-wide rate with a clean denominator for either virus. The Risk Perspective leaves such cells blank rather than substituting a single study.
Can the two be compared globally?
Not annually. WHO estimates about a billion influenza cases and 290,000–650,000 deaths a year, but publishes no comparable annual COVID-19 figure now that reporting has wound down — only cumulative totals. The record explains the gap rather than charting it.
This comparison is statistical and epidemiological. It is not medical advice or a risk assessment for any individual; the network's spoke pages cover symptoms, treatment and what to do about exposure for each virus.