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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. Measles, Mumps, Rubella & Varicella (Proquad)
  4. Incorrect product storage
Measles, Mumps, Rubella & Varicella (Proquad)×Incorrect product storage

Incorrect product storage Reports for Measles, Mumps, Rubella & Varicella (Proquad)

#4 most reported symptom for this vaccine

2,636
Reports
0
Deaths
0
Hospitalizations
0
Mortality Rate
%
0
Hosp. Rate
%

Incorrect product storage and Measles, Mumps, Rubella & Varicella (Proquad)

Incorrect product storage has been reported 2,636 times in association with Measles, Mumps, Rubella & Varicella (Proquad) vaccination in VAERS. This represents 11.2% of all 23,562 reports for this vaccine.

Among these reports, 0 mentioned death (0.00%) and 0 involved hospitalization (0.0%).

Incorrect product storage is the #4 most frequently reported symptom for Measles, Mumps, Rubella & Varicella (Proquad) out of 936 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 2,636 reports of Incorrect product storage after Measles, Mumps, Rubella & Varicella (Proquad) vaccination may seem alarming, but context is critical.

The mortality rate among these reports is very low at 0.00%, suggesting most cases are non-fatal.

Important Context

•Association, not causation: These reports show Incorrect product storage occurred after vaccination, not that the vaccine caused it.
•Background rates: Incorrect product storage 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

Product storage error3,954 reportsInjection site erythema3,094 reportsPyrexia2,335 reportsInjection site swelling2,218 reports

Quick Facts

Reports:2,636
Deaths:0
Hospitalizations:0
% of Vaccine:11.2%
Rank:#4 of 936

Related Pages

Measles, Mumps, Rubella & Varicella (Proquad) OverviewIncorrect product storage (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.