“Protecting from disease” was always recognised in the medical community as meaning you’d not get the severe symptoms of the disease, not that you could not get infected at all and not pass it onto others.
Few, if any, vaccines have blocked infection. They work by preventing the onset of severe disease and usually by severely blunting infectiousness.
Few, if any, vaccines have blocked infection. They work by preventing the onset of severe disease and usually by severely blunting infectiousness.