Neither one of your links involve Covid or its vaccines.
One concerns Marek’s virus that infects chickens.
The other, the 2014 study, doesn’t mention any disease or vaccines at all. It’s presenting a new method for estimating vaccine efficiency.
So why exactly are you offering them as if they are evidence that Covid vaccines are leaky?
They are simply links to research papers that contain the definition of a leaky vaccine. Vaccines the do not prevent infection and transmission are leaky.
All of the current Covid vaccines are leaky because they do not prevent infection and transmission.