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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. Blood lactic acid
COVID-19 Vaccine×Blood lactic acid

Blood lactic acid Reports for COVID-19 Vaccine

#389 most reported symptom for this vaccine

1,548
Reports
274
Deaths
1,191
Hospitalizations
17.7
Mortality Rate
%
76.9
Hosp. Rate
%

Blood lactic acid and COVID-19 Vaccine

Blood lactic acid has been reported 1,548 times in association with COVID-19 Vaccine vaccination in VAERS. This represents 0.1% of all 1,121,388 reports for this vaccine.

Among these reports, 274 mentioned death (17.70%) and 1,191 involved hospitalization (76.9%).

Blood lactic acid is the #389 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 1,548 reports of Blood lactic acid 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), Blood lactic acid appears in only 0.1% of reports.

The 17.70% 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 Blood lactic acid occurred after vaccination, not that the vaccine caused it.
•Background rates: Blood lactic acid 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

Diplopia1,567 reportsEye irritation1,559 reportsHaemoglobin normal1,547 reportsElectrocardiogram ambulatory1,543 reports

Quick Facts

Reports:1,548
Deaths:274
Hospitalizations:1,191
% of Vaccine:0.1%
Rank:#389 of 9223

Related Pages

COVID-19 Vaccine OverviewBlood lactic acid (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.