I already take the IQ test with a big grain of salt. Now there were some small studies done on IQ in relation to COVID? And it supposedly decreases IQ by a few

I already take the IQ test with a big grain of salt. Now there were some small studies done on IQ in relation to COVID? And it supposedly decreases IQ by a few points? Yeah, right, I believe it right away man. And the vaccine increases your IQ?