Skip to main content
VaccineWatch
VaccinesSymptomsStatesAnalysisToolsDashboardCompare

VaccineWatch

Transparent access to VAERS data for informed decision-making. We present the data as-is, with appropriate context and disclaimers.

Explore Data

  • Vaccines
  • Symptoms
  • Manufacturers
  • States
  • Dashboard
  • Compare Tool
  • Search

Deep Dives

  • The Denominator Problem
  • Onset Timing
  • Lot Number Analysis
  • COVID Impact
  • Myocarditis
  • Death Reports
  • Interactive Tools
  • All 23 Articles →

Resources

  • About
  • Methodology
  • FAQ
  • Glossary
  • Side Effects Guide
  • Vaccine Schedule
  • Vaccine Safety
  • Safety Timeline
  • Adverse Events
  • Is VAERS Reliable?
  • Report an Event
  • Disclaimer
  • VAERS Official Site ↗

Sister Sites

  • OpenMedicaid
  • OpenFeds
  • OpenSpending
  • OpenMedicare
  • OpenLobby
  • TheDataProject.ai

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.

⚠️

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. States
  3. Massachusetts

Massachusetts

MA46,109 total reportsRank #14 of 65 jurisdictions
Share
46,109
Total Reports
296
Deaths
2,429
Hospitalizations
8,914
ER Visits

About Massachusetts VAERS Data

Massachusetts (MA) has 46,109 adverse event reports in VAERS, representing 2.3% of all reports nationwide.

Of these, 296 mentioned death, 2,429 involved hospitalization, and 8,914 required emergency department visits.

With an estimated population of 7,029,000, Massachusetts has approximately 656.0 reports per 100,000 residents.

Top Vaccines Reported in Massachusetts

VaccineReportsDeathsHospitalizations
COVID1923,8732111,460
FLU33,16425220
VARZOS2,728484
VARCEL2,623867
MMR1,852580
PPV1,7917118
HEP1,5311291
FLU41,476540
DTAP1,3611071
COVID19-21,257753
HIBV1,19424156
TDAP1,109338
IPV993747
PNC13908564
HPV4810351
HEPA768326
FLUX697246
PNC6851686
MNQ625326
TD602323

Understanding State-Level Data

•Population drives volume: More populous states naturally have more reports.
•State of reporter: Reports are attributed to where the reporter lives, which may differ from where vaccination occurred.
•Reporting culture varies: States with more awareness of VAERS or mandated reporting may have higher per-capita rates.

Quick Facts

Reports:46,109
Deaths:296
Hospitalizations:2,429
ER Visits:8,914
Share of Total:2.3%
Rank:#14 of 65 jurisdictions
Population:7,029,000
Reports per 100K:656.0

Explore Further

Top Vaccine: COVID19All StatesGeographic AnalysisCompare Vaccines

Related Analysis

Geographic Patterns Analysis →35 Years of Reporting Trends →COVID-19 Impact on VAERS →Serious Outcomes Analysis →Death Reports Deep Dive →

Data Source

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