The Centers for Disease Control and Prevention (CDC) said on Feb. 10 in updated guidance on its website that certain vaccinated persons don't have to quarantine after they are exposed to someone with COVID-19.
"Fully vaccinated" persons, per the CDC, are individuals who have received the full dosage of either a two-dose or single-dose vaccine for more than two weeks. In order to avoid quarantine, individuals will also need to meet two additional criteria, being that they "are within 3 months following receipt of the last dose" of their vaccine and "have remained asymptomatic since the current COVID-19 exposure."
Moderna’s vaccine uses the same mRNA technology. Dr. Tal Zaks, Moderna’s chief medical officer, says the makeup of the two vaccines aren't identical, with some of the lipids or fats encasing the vaccines being different.