A Moderna booster dose is an additional shot of the Moderna COVID-19 vaccine, given after your initial vaccination series. Its purpose is to restore or increase immunity that may have decreased over time. • Primary series: Usually two doses of Moderna, spaced apart. • Booster dose: A follow-up shot to “boost” your immune system against newer variants. • Bivalent booster (introduced... https://urgentway.com/covid-19-vaccine/