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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.

  1. Home
  2. Vaccines
  3. COVID-19 Bivalent (Moderna)
  4. Haematocrit decreased
COVID-19 Bivalent (Moderna)×Haematocrit decreased

Haematocrit decreased Reports for COVID-19 Bivalent (Moderna)

#471 most reported symptom for this vaccine

40
Reports
5
Deaths
30
Hospitalizations
12.5
Mortality Rate
%
75
Hosp. Rate
%

Haematocrit decreased and COVID-19 Bivalent (Moderna)

Haematocrit decreased has been reported 40 times in association with COVID-19 Bivalent (Moderna) vaccination in VAERS. This represents 0.1% of all 42,946 reports for this vaccine.

Among these reports, 5 mentioned death (12.50%) and 30 involved hospitalization (75.0%).

Haematocrit decreased is the #471 most frequently reported symptom for COVID-19 Bivalent (Moderna) out of 2434 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 40 reports of Haematocrit decreased after COVID-19 Bivalent (Moderna) vaccination may seem alarming, but context is critical.

The 12.50% 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 Haematocrit decreased occurred after vaccination, not that the vaccine caused it.
•Background rates: Haematocrit decreased 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

Post-acute COVID-19 syndrome40 reportsAcoustic stimulation tests abnormal40 reportsForeign travel40 reportsBiopsy skin abnormal39 reports

Quick Facts

Reports:40
Deaths:5
Hospitalizations:30
% of Vaccine:0.1%
Rank:#471 of 2434

Related Pages

COVID-19 Bivalent (Moderna) OverviewHaematocrit decreased (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.