The public is questioning the actual efficacy of the alternative regimen of the COVID-19 vaccine that reduces dose or delays the booster dose due to the vaccine shortage,

Relevant experts give conflicted opinions. Some argue the government should maximize the efficacy with the limited resource, whereas some claim medical evidence is integral before making a hasty decision.

▲Three conflicts: delaying second dose, switching vaccine type and reducing dose volume

The main considerations on the vaccine inoculation plan are spacing out the vaccine interval designed at the clinical phase, switching between vaccine types, and lessening the vaccine dose instead of delaying t