Moderna's unstable supply and demand disrupted the vaccination. Moderna's vaccine was originally scheduled to come in 8.5 million doz in August, but Moderna informed that it would supply less than half of the vaccine due to laboratory problems related to production. As a result, not only Moderna but also the first and second vaccinations of the same mRNA vaccine, Pfizer vaccine, will temporarily increase inoculation interval from four weeks to six weeks.

The quarantine authorities, which are preparing for the final vaccination in their 40s or younger due to the sudden supply disruption notice by Moderna, are also in trouble. However, since Pfizer vaccine is being supplied properly, it is expected that t