Pfizer claim that their covid vaccine is 95% effective, but their chairman says: “we’re not sure if someone can transmit the virus after vaccination”. So what is it effective at, then?

We have all seen the news that the Pfizer COVID vaccine is 95% effective right?

Effective at what exactly?

Reducing symptoms of a disease with a 99+% survival rate?

Here the Pfizer chairman clearly states…

'We're not sure if someone can transmit the virus after vaccination' pic.twitter.com/Ps91uMMZVP

— Spiro (@o_rips) December 5, 2020

h/t Razerer92