# CDC COVID-19 vaccine safety page excerpts captured in browser
URL: https://www.cdc.gov/vaccine-safety/vaccines/covid-19.html
Captured: 2026-08-26

Key extracted points from the live page:
- CDC says it continuously monitors COVID-19 vaccines through several safety systems.
- CDC page says systems have identified anaphylaxis and myocarditis/pericarditis as serious adverse events following COVID-19 vaccination.
- CDC describes myocarditis/pericarditis after COVID-19 vaccination as rare.
- CDC says Vaccine Safety Datalink data found Guillain-Barré syndrome rates higher after J&J/Janssen than after Pfizer/Moderna, and that J&J/Janssen is no longer available in the U.S. as of May 2023.
- CDC says thrombosis with thrombocytopenia syndrome (TTS) is a rare condition seen in very few cases after J&J/Janssen, about 4 people per million doses, causing blood clots and low platelets.
- CDC says reports of death after vaccination can be concerning but VAERS death reports do not automatically prove causation.