This right here. The vaccine's should never have been marketed as being able to stop infection. Given the history of previous coronaviruses it makes no sense that a vaccine would suddenly be able to stop people from getting infected by the disease. The vaccine's only strength is in decreasing the severity of symptoms. This can lead to less infection since there will be fewer people who hit the threshold for a transmissible viral load (without going in to the deep end on infectious vs non-infectious viral loads), but does not stop infection entirely.