- Moderna reports significantly higher risk of common side effects
- 5,052 vaccine recipients suffered a “health impact event” as of Dec. 19
- CDC defines “health impact event” as one that renders a patient “unable to perform normal daily activities, unable to work, required care from doctor or health care professional”
- That’s a rate of about 2.3% of vaccine recipients
- CDC says a severe allergic reaction, anaphylaxis, was reported in 6 patients
- Both vaccines are effective at reducing the risk of symptomatic COVID-19 for at least 14 days (Moderna) or more than two months (Pfizer-BioNTech)
- It’s impossible to know how effective the vaccines are beyond the number of days they’ve been given to humans. It’s also impossible to know this soon what are the potential long term side effects, if any.
CDC emphasizes that it believes both of the COVID-19 vaccines approved for emergency use are safe and effective.
The agency is keeping a close eye out for adverse events.
The agency’s “V-safe active surveillance program,” which allows for patients to voluntarily, directly report adverse events outside of the normal VAERS (Vaccine Adverse Event Reporting System), reports that a total of 215,362 people had received their first dose of vaccine as of December 18.
Of that number, 5,052 or 2.3% were reported to have an unspecified “health impact event” defined by CDC as serious enough that they were “unable to perform normal daily activities, unable to work, required care from doctor or health care professional.”