Pfizer says third vaccine shot 'strongly' boosts immune response against delta variant

Pfizer said Wednesday that a third dose of its COVID-19 vaccine "strongly" boosts the immune response against the delta variant.

The company posted slides ahead of an earnings call, with data showing that antibody levels were five times higher after a third dose among people aged 18 to 55 against the delta variant, and 11 times higher among 65- to 85-year-olds.

Pfizer made waves earlier this month when it said it would be applying for Food and Drug Administration (FDA) authorization for a third dose of its vaccine.

Still, it is not...