There were several articles months ago stating that the vaccinated and the unvaccinated have the same viral load in the nasal pharynx including a video of Fauchi saying the same thing. The R naught for the delta virus is 6 - 8 meaning that an infected person will spread the virus to 6 to 8 people. The vaccine could reduce the infectiveness by 20% so that may reduce the number from 6 infected to 5 so you would not notice the difference.
