'covid test' is actually wrong. When people who are vaccinated against covid test 'positive', they don't have covid. They test positive to the presence of SARS Cov-2 virus.They really should be called SARS Cov-2 tests
Covid is the disease that the SARS Cov-2 virus gives you
The vaccine works and does its job as expected. People come into contact with the virus (evidenced by the positive test result) and almost all of them do not go on to develop the disease.
A vaccine prevents infection.
Almost doesn't cut the mustard.
Not everyone who gets the vaccine can mount an effective immune response. Diseases, drugs to suppress the immune system because you may have a transplanted organ, pregnancy or being old that your body just doesn't work like it used to are reasons
Also how you behave before/after your vaccine shot can affect its efficacy. Alcohol and sleep deprevation for example can reduce its effectiveness
So in the billions of people getting the vaccine, you can bet there will be some that fall into these cohorts
Are you really this dense you wouldn't know? Wow