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Data source: VAERS (Vaccine Adverse Event Reporting System)

Data through 2026 · Updated quarterly

Built by TheDataProject.ai · © 2026 VaccineWatch

Important: VAERS accepts reports of adverse events following vaccination. For any given report, there is no certainty that the reported event was caused by the vaccine. Reports may contain information that is incomplete, inaccurate, coincidental, or unverifiable. Most reports to VAERS are voluntary, which means they are subject to biases. This data cannot be used to determine if vaccines cause or contribute to adverse events.

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Important: VAERS reports alone cannot determine if a vaccine caused an adverse event. Reports may contain incomplete, inaccurate, or unverified information. Correlation does not equal causation.

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  3. COVID-19 Vaccine
  4. Hypervolaemia
COVID-19 Vaccine×Hypervolaemia

Hypervolaemia Reports for COVID-19 Vaccine

#887 most reported symptom for this vaccine

452
Reports
121
Deaths
410
Hospitalizations
26.77
Mortality Rate
%
90.7
Hosp. Rate
%

Hypervolaemia and COVID-19 Vaccine

Hypervolaemia has been reported 452 times in association with COVID-19 Vaccine vaccination in VAERS. This represents 0.0% of all 1,121,388 reports for this vaccine.

Among these reports, 121 mentioned death (26.77%) and 410 involved hospitalization (90.7%).

Hypervolaemia is the #887 most frequently reported symptom for COVID-19 Vaccine out of 9223 total symptoms.

Disclaimer: VAERS reports describe events that occurred after vaccination but do not establish that the vaccine caused the event. Many reported symptoms may be coincidental or related to underlying conditions.

What This Means

Seeing 452 reports of Hypervolaemia after COVID-19 Vaccine vaccination may seem alarming, but context is critical. With 1,121,388 total reports for this vaccine (representing many millions of doses), Hypervolaemia appears in only 0.0% of reports.

The 26.77% mortality rate among these reports is elevated, but this reflects the severity of the condition itself rather than vaccine causation.

Important Context

•Association, not causation: These reports show Hypervolaemia occurred after vaccination, not that the vaccine caused it.
•Background rates: Hypervolaemia may occur naturally at baseline rates in the population, unrelated to vaccination.
•Anyone can report: VAERS accepts reports from anyone — patients, parents, healthcare providers — without requiring medical verification.
•Denominator missing: VAERS counts reports, not rates per dose. Without knowing how many doses were given, raw counts can be misleading. Learn more →

Similarly Ranked Symptoms

Cystitis453 reportsSinus rhythm452 reportsInfluenza A virus test450 reportsBasophil count decreased450 reports

Quick Facts

Reports:452
Deaths:121
Hospitalizations:410
% of Vaccine:0.0%
Rank:#887 of 9223

Related Pages

COVID-19 Vaccine OverviewHypervolaemia (All Vaccines)Why Raw Numbers MisleadTop Symptoms Analysis

Data Source

This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.