Index/Organizations/Vaccine Adverse Event Reporting System

Vaccine Adverse Event Reporting System

System managed by the CDC and FDA that measures harms from vaccines to ascertain whether the risk-benefit ratio is high enough

Fact-Checks

74 results
Dec 12, 2025
Most Viewed

How many VAERS death reports after COVID-19 vaccines were confirmed as causally linked by CDC or FDA as of 2024?

Available reporting shows an internal FDA review of 96 pediatric death reports to VAERS from 2021–2024 concluded at least 10 of those reports met criteria for “likely, probable, or possible” causal li...

Nov 2, 2025
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How many reported deaths have been directly linked to Covid vaccines since 2020?

Since 2020 there is no single, universally accepted count of deaths “directly linked” to COVID‑19 vaccines; national autopsy-based reviews and regulatory surveillance offer than raw adverse‑event repo...

Nov 1, 2025
Most Viewed

How many people died from Covid vaccine

Reported tallies of "deaths from COVID vaccine" vary widely because they mix raw, unverified reports with adjudicated findings; passive surveillance systems like VAERS show tens of thousands of report...

Dec 17, 2025

What claims has michael yeadon made regarding pfizer and were they verified by fact-checkers?

Michael (Mike) Yeadon, a former Pfizer allergy and respiratory research vice president who left the company in 2011, has made repeated claims about Pfizer, COVID-19 vaccines, fertility, children’s saf...

Nov 29, 2025

How many reported deaths have been directly linked to childhood vaccinations in the US since 2020?

Available mainstream reporting shows a recent internal FDA review concluded that at least 10 children died “after and because of” COVID-19 vaccination based on an analysis of 96 VAERS‑reported pediatr...

Dec 2, 2025

How many deaths have VAERS recorded after COVID-19 vaccines as of 2024?

As of late April 2024, public downloads of VAERS raw data compiled by independent trackers showed hundreds to over a million COVID‑19–associated reports depending on scope and whether domestic-only da...

Dec 11, 2025

Did rates of myocarditis or pericarditis change with the 2024-2025 COVID vaccine formulations?

Available surveillance and regulatory reports show the 2023–2024 mRNA COVID vaccines had estimated myocarditis/pericarditis incidence of roughly 8 cases per million doses overall and higher rates in y...

Dec 20, 2025

What specific rare adverse events have been reported to CDC's vaccine safety systems for the 2025 flu vaccines and how frequently?

CDC systems have flagged a small number of rare adverse events after seasonal influenza vaccination in 2025, most notably Guillain–Barré syndrome (GBS) at an estimated excess risk of about one to two ...

Dec 6, 2025

Comparison of myocarditis risks in different COVID vaccines

Available studies and regulatory summaries show myocarditis after COVID-19 vaccination is rare, concentrates in males aged ~12–24 and most often occurs within days of a second mRNA dose; FDA cites ~27...

Nov 10, 2025

What percentage of VAERS reports are confirmed as vaccine-caused deaths?

VAERS is a passive reporting system that collects unverified reports of adverse events after vaccination; and public‑health reviews find that confirmed vaccine‑caused deaths are effectively zero or an...

Nov 15, 2025

What are the major controversies surrounding Dr Sanjay Gupta's COVID-19 commentary?

Dr. Sanjay Gupta’s COVID-19 commentary has generated disputes over three main areas: his public fights with conservative media figures over vaccine messaging, his appearances on platforms that critics...

Dec 17, 2025

What side effects and risks are associated with repeat dosing or booster shots of Prevnar 20?

Clinical trials and product information show Prevnar 20 (pneumococcal 20‑valent conjugate vaccine) is generally well tolerated; the most common reactions after a dose are injection‑site pain, muscle p...

Jan 17, 2026

Safety of shingles vaccine

The currently recommended shingles vaccine, Shingrix (recombinant zoster vaccine, RZV), has a strong safety and effectiveness record in clinical trials and large real‑world studies, with common short‑...

Nov 7, 2025

What are the most common neurological side effects reported after COVID vaccination in 2021-2024?

The preponderance of reports from 2021–2025 shows that the . Large passive-safety datasets and narrative reviews agree that serious neurological adverse events are uncommon relative to vaccine doses a...

Dec 12, 2025

What is the official CDC/FDA statement on confirmed vaccine-related deaths through 2024?

The official federal stance is mixed: the FDA’s vaccine chief Vinay Prasad circulated an internal memo saying an FDA review of 96 pediatric deaths reported to VAERS “concludes that no fewer than 10 ar...

Dec 4, 2025

Norman Fenton and others dispute success of Covid vaccines and disease severity itself

Norman Fenton, an emeritus professor of risk and information management, has publicly challenged mainstream COVID-19 vaccine effectiveness and safety analyses and says his work has been de‑platformed ...

Dec 1, 2025

How do confirmed vaccine-related death counts compare to background mortality rates in US children since 2020?

An internal FDA review of 96 pediatric deaths reported to VAERS from 2021–2024 concluded that “no fewer than 10” deaths were related to COVID-19 vaccination, with staff attributing those deaths primar...

Jan 16, 2026

What rare adverse events have been causally linked to MMR and how frequently do they occur?

The MMR vaccine has a well-established safety profile: common reactions are mild and transient (fever, rash, injection-site pain), while a small set of rare serious events have been causally linked to...

Dec 19, 2025

How does the risk of long-term effects from J&J compare to mRNA COVID-19 vaccines (Pfizer/Moderna)?

The evidence collected during and after large-scale COVID-19 vaccination campaigns shows different long-term safety signals for the adenovirus-vector Johnson & Johnson (J&J/Janssen) shot versus the mR...

Dec 14, 2025

How can I verify a Pfizer vaccine lot number against manufacturer records online?

There is no single public, consumer-facing Pfizer database that lets you enter a lot number and get full manufacturer records; multiple guidance pages and reporting routes instead point users to vacci...