“…100% immunity), there was a significantly greater proportion of deaths averted if the third dose was administered. However, the Omicron variant has strong immune evasion ability, and the antibody response to the third vaccine dose against Omicron was weaker relative to the Alpha, Beta, and Delta variants [ 34 ]. Its emergence weakened the level of herd immunity [ 35 ] and changed the fate of the COVID-19 pandemic.…”