Among those who received the Pfizer booster, headaches were the third most common side effect (38 percent), followed shortly by muscle aches (36 percent).
The rarest side effects encountered with all three vaccines were abdominal pain, rashes and vomiting.
Separate figures released by the CDC show fatigue is more common with a booster shot of Pfizer and Moderna, compared to the second dose of each. These findings, however, may vary across different age groups.
The data collated for the two mRNA vaccines were based on a clinical trial of 12,000 people.
The mRNA technology behind the Moderna and Pfizer jab works by introducing instructions into genetic material, called mRNA, to make the spike protein of the coronavirus.