source: https://abc7ny.com/pfizer-booster-shot-3rd-dose-covid-vaccine-vaccines-coronavirus/10914062/
A third dose of the Pfizer/BioNTech COVID-19 vaccine can “strongly” boost protection against the delta variant — beyond the protection afforded by the standard two doses, suggests new data released by Pfizer on Wednesday.
The data posted online, which are expected to be discussed in a company earnings call on Wednesday morning, suggest that antibody levels against the delta variant in people ages 18 to 55 who receive a third dose of vaccine are greater than five-fold than following a second dose.
Among people ages 65 to 85, the Pfizer data suggest that antibody levels against the Delta variant after receiving a third dose of vaccine are greater than 11-fold than following a second dose.