Hint to the wucking clueless. There's a reason why it's a series of two vaccines. Because the second shot completes an "immune response" process that requires a supplementary shot.
It's absolutely normal for the odd person (some people's acquaintance with 'odd' people may be story-exaggerated) to come down with COVID-19 after a first dose. It's also statistically, very possible, to come down with COVID after two vaccines. What is MOST unlikely, is that one will sicken enough to require admission to an ICU, the main plan here...
Some people have proved that their friends are either total wucking idiots, non-existent, or not real friends. Friends do not encourage friends to drink the Koolaid.