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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 Vaccine
  4. Platelet count decreased
COVID-19 Vaccine×Platelet count decreased

Platelet count decreased Reports for COVID-19 Vaccine

#225 most reported symptom for this vaccine

3,269
Reports
325
Deaths
2,186
Hospitalizations
9.94
Mortality Rate
%
66.9
Hosp. Rate
%

Platelet count decreased and COVID-19 Vaccine

Platelet count decreased has been reported 3,269 times in association with COVID-19 Vaccine vaccination in VAERS. This represents 0.3% of all 1,121,388 reports for this vaccine.

Among these reports, 325 mentioned death (9.94%) and 2,186 involved hospitalization (66.9%).

Platelet count decreased is the #225 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 3,269 reports of Platelet count decreased 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), Platelet count decreased appears in only 0.3% of reports.

The 9.94% 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 Platelet count decreased occurred after vaccination, not that the vaccine caused it.
•Background rates: Platelet count 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

Troponin3,341 reportsFibrin D dimer3,279 reportsEchocardiogram normal3,267 reportsInjection site mass3,253 reports

Quick Facts

Reports:3,269
Deaths:325
Hospitalizations:2,186
% of Vaccine:0.3%
Rank:#225 of 9223

Related Pages

COVID-19 Vaccine OverviewPlatelet count 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.