According to a recent study, more people who received the Moderna coronavirus vaccine reported side effects than those who received the Pfizer vaccine.
The researchers analyzed reports from more than 3 million vax recipients collected through v-safe, a Centers for Disease Control and Prevention program that tracks immunization reactions.
Nearly 70 percent said they had some kind of reaction at the injection site, such as pain or swelling, and half reported general side effects, such as fatigue or chills, the study found.
A higher percentage of participants who received the Moderna vaccine compared to the Pfizer-BioNTech vaccine reported reactogenicity; this pattern was more pronounced after the second dose “, the researchers remarked.
Of those who received the Moderna vaccine, 73% said they had a reaction at the injection site, compared with 65% of people who received the Pfizer vaccine, the study found.
Nearly 51% of Moderna recipients reported whole-body symptoms, compared with 48% of those receiving the Pfizer vaccine.
Reports came from more than 3.6 million people who received the first dose of COVID-19 vaccine before February 21 and completed at least one health survey on v-safe within seven days of getting hit.
The gap widened after the second dose, according to reports from about 1.9 million people who completed these checks after being shot no. 2, is shown in the study.
Nearly 82 percent of people receiving the second Moderna vaccine had pain at the injection site, compared with less than 69 percent of those with Pfizer.
Overall, 74% of Moderna recipients said they had whole-body symptoms, compared with 64% of people who received Pfizer vax.
About 40% of people with Moderna specifically reported chills, compared with only 22% of those who received Pfizer.
Data from millions of safe v participants indicate that pain at the injection site is common after both the first and second doses of any mRNA-based vaccine, the researchers noted.
The study was published Monday in the medical journal evaluated by JAMA colleagues.